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This ensures the signal will get disconnected if object is finalized.

Some widgets with contruct properties like GtkMessageDialog get
rebuilt right after they are created on project loading so we need
to check glade_project_is_loading() intead of GLADE_CREATE_LOAD
and use the object ad the connect data to make sure it gets disconected
if it was the object being rebuilt

Fix issue #479 "Glade 3.36.0 segfaults when opening a file"

We need to make sure internal widgets parent and object are unset
while rebuilding to avoid having a GladeWidget with a dead object.

Respect user_feedback parameter in glade_gtk_scrolled_window_add_child_verify()

Make sure you can not remove parent if the grand parent is a scrolled window
and the child is not scrollable.

Fix issue #471 "XML not updated after adding element"

(cherry picked from commit 08ca3fcb)

Properly load/save pango color attributes

Fix issue #474 "GtkLabel: setup text attribute issues"

Cleanup PangoColor and GdkColor handling in make_string_from_gvalue and
make_gvalue_from_string functions.

Make sure target version combo gets updated on project load.

Fix issue #480 "version field not always updated in XML"

Use default pointer device instead of device from current event
since a paste can be triggered by the keyboard.

This fix issue pasing widget with ctrl+v in GtkGrid

Adjust container size in create and paste command.

Properly fix issue #470 "Widgets of type need placeholders to add children"

Add missing copyright notes

Fix glade_gtk_grid_add_child() return after adding child to avoid
adding it more than once.

(cherry picked from commit c2758d91)

Apply packing properties to scrolled window instead of viewport

Add child to the first placeholder

Support adding widgets to GtkBox and GtkGrid even if there are no placeholders

Fix issue #470 "Widgets of type need placeholders to add children"

Increase size of grid/box if there is no space to add a widget in the container

Fix issue #470 "Widgets of type need placeholders to add children"

Use display name for messages

This reverts commit 3b94aec9.

(cherry picked from commit 5a6ea0dc)

Closes issue #472 "gnome-nightly: About dialog should display git commit rev"

Add a viewport for non scrollable widget when adding a
scrolled window parent.

Fix issue #471 "XML not updated after adding element"

Inform the user it has to increase the size of the container if there is
no more placeholders in it.

Special case GtkBin since Windows can hace a placeholder in the titlebar.

To make things easier you can always add a widget to a box or grid even if
there is no more placeholders.
Adding a widget will automatically increase the box size number or
the grid column count.

Fix issue #470 "Widgets of type need placeholders to add children"

(cherry picked from commit 30a63acd)

(cherry picked from commit 920297f0)

(cherry picked from commit 4142b6c7)

(cherry picked from commit c68d6c88)

(cherry picked from commit b3bf5b39)