Overview of Changes in 4.4.0
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* Input:
- Match IBus for display of Compose sequences
- Match IBus for handling of mismatches
- Handle Escape in Compose sequences
- Allow multiple dead keys
- Support 32bit keysyms

* GtkCheckButton:
- Activate when moving focus

* GtkLabel:
- Propertly ignore double underscores for mnemonics

* GtkPopoverMenu:
- Fix focus cycling

* GtkTextView:
- Improve word selection
- Fix block cursors on empty lines

* GdkToplevel:
- Support the gnome-shell titlebar gesture protocol

* GdkDropTarget:
- Allow creating drop targets in ui files

* gsk:
- Handle partial color fonts correctly
- Use harfbuzz for color font information
- Avoid pango for glyph cache rendering
- Shrink shadow extents

* Settings:
- Change the default for gtk-split-cursor to FALSE

* Demos:
- Small improvements to widget-factory
- gtk-demo: Improve the hypertext demo
- gtk-dem: Improve the clipboard demo

* X11:
- Set WM_CLASS on toplevels

* Wayland:
- Support wl_seat v7

* Windows:
- Drop the local DND protocol
- Avoid WGL if shaders don't work
- Use WinPointer API

* Translation updates:
Belarusian
Friulian
Hebrew
Khmer
Persian
Polish