GitLab

Point to Gitlab instead of the read-only Bugzilla.

If the dialog's default size is too small enlarging it can
make the button text/the folder readable again.

eog commonly uses 12px spacing in its dialogs, not 10.

export-to-folder: Fix setting target directory

See merge request !1

Currently changing target directory from GUI doesn't always work. If
user chooses directory from drop-down list of GtkFileChooserButton,
'current-folder-changed' signal isn't emitted and configuration isn't
updated.

Instead of using 'current-folder-changed' signal from GtkFileChooser
interface, use 'file-set' signal from GtkFileChooserButton.

Furthermore get_currect_folder() doesn't correspond to the selected
folder, but to the folder containing selected folder. Therefore it is
changed to get_filename(). For more info see manual for
gtk_file_chooser_get_current_folder().

Use G_ADD_PRIVATE instead. Upcoming glib releases will mark
g_type_class_add_private as deprecated so this will avoid a
deprecation warning during build with these versions.