gtk 3.99.4

[Matthias Clasen <install-module master gnome org>]

News
====

* GtkColumnView:
 - Improve column resizing
 - Make double-click reset column widths
 - Move header outside of scrollbars

* GtkSearchEntry:
 - Add an icon

* GtkDropDown:
 - Polish the appearance

* GtkColorChooser:
 - Accessibility improvements

* GtkPopoverMenu:
 - Add accessibility support
 - Allow custom items. This adds new API:
   gtk_popover_menu_add/remove_child
   gtk_popover_menu_bar_add/remove_child

* GtkTextView:
 - Fix rendering and positioning of anchored children
 - Fix positioning of touch handles

* Constraints:
 - Fix loading constraints from ui files

* Media support:
 - Use cubic instead of linear volume

* Accessibility:
 - Implement Component for all widgets
 - Implement Text and EditableText for all editables
 - Rework accessible name/description computation
 - Add documentation for app and widget developers
 - Handle HIDDEN state changes by adding/removing elements
 - Support setting accessibility attributes in ui files
 - Make window controls accessible

* Introspection:
 - Add some missing annotations

* gdk:
 - Deliver events on flush
 - Drop the unused GdkPoint struct from the API
 - Improve popup autohide behavior

* Demos:
 - Add another constraints demo
 - Tweak various demos to improve consistency
 - Small accessibility improvements

* Tools:
 - Improve gtk4-builder-tool handling of various
   widgets when converting ui files from GTK 3

* Documentation:
 - Use GtkApplication in all examples
 - Improve and expand the widget gallery

* Testsuite:
 - Improve coverage of GDK
 - Improve coverage of gtk4-builder-tool

* Build:
 - Fix the build with cups 2.2.12
 - Make cloudprint support build without warnings

* Broadway:
 - Support modifiers for scroll events

* Windows:
 - Improve IME support

* OS X:
 - Fix various input issues
 - Make GtkGLArea work (with the cairo backend)

* Translation updates:
 German
 Polish




Download
========
https://download.gnome.org/sources/gtk/3.99/gtk-3.99.4.tar.xz (18.6M)
  sha256sum: 8979cb1eb6ad2a496e00e94674d23f90aefae5d3f23b623ffda0b35d11ec85d0