gtk+ 3.22.2 release.

• Several improvements to the win32 theme

• Deprecations have been added for APIs that will be removed in GTK+ 4

Bug fixes:

• 767713 Fullscreen in wayland is buggy
• 771320 Maps widget is displayed at wrong position inside gnome-contacts
• 772345 placesviewrow: busy_spinner when visible offsets the rest of the...
• 772389 Appending a character to a GtkEntry control in overwrite mode ri...
• 772415 Avoid calling eglGetDisplay
• 772552 Deprecate gtk_menu_popup
• 772683 Usage of FALSE instead of gint in glarea demo
• 772695 Show the keyboard shortcuts from left to right even in RTL
• 772775 menu bindings needs attribute to force LTR for horizontal-button...
• 772859 Fix memory leaks in implementations of common widgets
• 772922 GtkMenu: Try using gdk_window_move_to_rect() more often
• 772926 shortcutswindow: working version of set_section_name()
• 773029 style-set signal problem
• 773082 overlay: Document availability of properties
• 773113 tests: fix clipboard test by loading correct icon
• 773180 Don't second-guess whether our GDK GL context is GLES
• 773246 Typo in css color definitions documentation