* glom/utility_widgets/imageglom.[h|cc]: Move scale_keeping_ratio() to
glom/utils_ui.[h]cc] as Utils::image_scale_keeping_ratio().
* glom/utility_widgets/canvas/canvas_image_movable.cc:
* glom/utility_widgets/db_adddel/db_adddel.cc:
* glom/utility_widgets/flowtable_dnd.cc: Adapted.

  * glom/mode_data/datawidget/: Removed Glom suffixes from class names
  and filenames, and put classes in a DataWidgetChildren sub-namespace,
  to make it clearer where we occasionally use these outside of DataWidget.

  * glom/utility_widgets/datawidget.[h|cc]: Moved to glom/mode_data/datawidget/
  because it is only used by the data-mode flowtable.
	* glom/utility_widgets/buttonglom.[h|cc]
	* glom/utility_widgets/checkglom.[h|cc]
	* glom/utility_widgets/combo_as_radio_buttons.[h|cc]
	* glom/utility_widgets/combochoices.[h|cc]
	* glom/utility_widgets/combochoiceswithtreemodel.[h|cc]
	* glom/utility_widgets/comboentryglom.c[h|cc]
	* glom/utility_widgets/comboglom.[h|cc]
	* glom/utility_widgets/dialog_choose_date.[h|cc]
	* glom/utility_widgets/dialog_choose_id.[h|cc]
	* glom/utility_widgets/entryglom.[h|cc]
	* glom/utility_widgets/labelglom.[h|cc]
	* glom/utility_widgets/textviewglom.[h|cc]
	* glom/utility_widgets/placeholder-glom.[h|cc]: Also move these to
  glom/mode_data/datawidget because they are only used by DataWidget.
	* glom/utility_widgets/alignment_justified.[h|cc]:
	* glom/utility_widgets/table_columns.[h|cc]: Deleted these unused classes.
  * Makefile_glom.am: Adapted.

* glom/glom_developer.glade: Various dialog layout fixes.
* glom/mode_design/layout/layout_item_dialogs/dialog_imageobject.cc:
* glom/mode_design/layout/layout_item_dialogs/dialog_imageobject.h:
* glom/mode_design/layout/layout_item_dialogs/dialog_textobject.cc:
* glom/mode_design/layout/layout_item_dialogs/dialog_textobject.h:
Update box variable name and add window icons.

* glom/application.cc: Update copyright year in about dialog.

* glom/application.cc: on_document_load(): Add an extra call to
    document_history_add() after successfully saving from an example.

* glom/frame_glom.cc: Rename Quick Find to Quick Search and add
mneomnic.
* glom/glom.glade: Update find id dialog and remove frame.
* glom/utility_widgets/datawidget.cc: Add window icon to find id
dialog.

* glom/glom.glade: Spacing adjustments to make dialogs more HIG
compliant.

* glom/glom_developer.glade: Initial Password Dialog tweaks.
* glom/mode_design/dialog_initial_password.cc: Set window icon.

* glom/glom.glade: Import dialog tweaks.
* glom/import_csv/dialog_import_csv.cc: Add window icon, change title
order.

* glom/frame_glom.cc: Add window icons and fix capitalisation of
primary texts (dialog text uses sentence capitalisation).

* glom/glom.glade: Set a reasonable default size for the progress
dialog, that allows to read the title at least.

* glom/glom_developer.glade: Spacing and mnemonic adjustments/fixes,
remove frame label.
* glom/mode_design/layout/dialog_choose_field.cc: Add window icon.

* glom/dialog_progress_creating.cc: Add window icon.
* glom/glom.glade: Center dialog on parent window.

* glom/dialog_existing_or_new.cc: Also don't show error icon for
empty recent documents.

* glom/dialog_existing_or_new.cc: Fix typo and use of properties, don't
show error icon when no network sessions are available.
* glom/glom.glade: Hide label and icon, spacing adjustments.

* glom/application.cc: Don't show colon in application title when
table name is empty.

* glom/frame_glom.cc: No table warnings are not needed anymore
for menu items, so remove them.

* glom/utils_ui.cc: show_ok_dialog: Set window icon.

* glom/dialog_existing_or_new.cc: Set window icon.

* glom/application.cc: update_table_sensitive_ui: Function to set
sensitivity of menu items depending on whether a table is loaded.
init_menus: Add table sensitive menu items to a list.
* glom/application.h: Add list to hold table sensitive menu items.
* glom/frame_glom.cc: Call update_table_sensitive_ui when needed.

	* glom/application.cc: Use lower case for short prepositions.

	* glom/application.cc: Add missing mnemonics and change double
	mnemonics.

* glom/glom_document.dtd: data_layout_button: Allow this to have a
    formatting child node, because we now allow this in the UI and save this.

    * Makefile_tests.am
* tests/glade_toplevels_instantiation.cc: Added this code for an
    executable that will try to instantiate all GtkWindow and GtkDialog
    objects in a specified .glade file. It also checks that they are not
    visible by default.
* tests/test_glade_toplevels_instantiation.sh: Added a tests script,
    run during make check, to run this executable on all our .glade files.

    * glom/glom.glade, glom_developer.glom: Fix small problems found by the
    test, removing an empty textbuffer top-level object and making all
    top-level objects non-visible by default.

	* glom/glom_developer.glade: Remove frame and adjust spacings for
	Relationships Overview dialog.

	* glom/glom_developer.glade: Actually set the correct mnemonic
	widgets for Report Layout input labels.

	* glom/glom_developer.glade: Remove bold markup for Report Layout
	input labels.

	* glom/frame_glom.cc: Set Report Layout dialog window icon.
	* glom/glom_developer.glade: Report Layout dialog spacing
	adjustments and mnemonics fix.

	* glom/frame_glom.cc: Set Reports dialog window title.
	* glom/glom_developer.glade: Remove frame from Reports dialog.

	* glom/box_reports.cc: Remove references to frame label.
	* glom/box_reports.h: Remove frame label member.
	* glom/frame_glom.cc: Set window icon for Fields and Relationships
	dialogs.
	* glom/glom_developer.glade: Adjust Fields and Relationships dialogs.
	* glom/mode_design/dialog_design.cc: Remove references to frame label.
	* glom/mode_design/dialog_design.h: Remove frame label member.
	* glom/mode_design/dialog_fields.cc: Remove references to frame label.
	* glom/mode_design/dialog_relationships.cc: Remove references to frame
	label.
	* glom/mode_design/print_layouts/box_print_layouts.cc: Remove
	references to frame label.
	* glom/mode_design/print_layouts/box_print_layouts.h: Remove frame
	label member.
	* glom/navigation/box_tables.cc: Remove references to frame label.

* glom/application.cc:
* glom/bakery/app_withdoc.cc:
* glom/libglom/connectionpool_backends/postgres_self.cc:
* glom/libglom/connectionpool_backends/sqlite.cc:
* glom/libglom/document/bakery/document.cc:
* glom/libglom/utils.cc:
* glom/xsl_utils.cc: Avoid creating a Gio::File() from an empty URI,
    avoiding useless stdout warnings at startup.

	* glom/glom_developer.glade: Update alignment and spacings, add mnemonics.
	* glom/mode_design/fields/box_db_table_definition.cc: Set window icon.

	* glom/filechooser_export.cc: Set icon name for export format dialog.
	* glom/glom_developer.glade: (Export Format) Remove frame, move Add
	button to the start.
	* glom/mode_design/layout/dialog_layout_export.cc: Rename treeview
	header to "Fields" to replace the label.

	* glom/frame_glom.cc: Set title and transient for Print Layouts dialog.
	* glom/glom_developer.glade: Remove the frame from Print Layouts dialog.

* glom/libglom/document/bakery/document.[h|cc]: Add an enum for
    standard failure_codes, including a last enum values that custom codes
    should start after.
    read_from_disk(): Set a failure_code output variable here too, so we
    can detect non-existant files.
* glom/libglom/document/document.h: Start the custom code after the last
    standard one.
* glom/bakery/app_withdoc.cc: open_document(): Remove non-existant
    files from the recent files history.
* glom/application.cc: ui_warning_load_failed(): Say if the file could not
    be found, instead of being mysterious. This happens for me often for
    recent files that I have deleted.

	* glom/dialog_existing_or_new.cc: Adjust title of file open dialog,
	set glom icon.
	* glom/utility_widgets/filechooserdialog_saveextras.cc: Set glom icon.

	* glom/utility_widgets/filechooserdialog_saveextras.cc: Add colon and
	mnemonic to "Title" label.