Log Message:
Update gtk3 to 3.22.6

Overview of Changes in GTK+ 3.22.6
==================================

* Bugs fixed:
 774534 776132 776187 776012 774784 776187 776306 775808 776524 776560
 774534 input shape and opaque region not applied without begin_paint()/end_paint()
 774784 Failed to get desktop session proxy is not an error!
 775808 win32 maximized window is larger than the extended screen in dual monitor
 776012 GtkFlowBox, GtkListBox: Don't emit signals etc. during destruction
 776132 Mention the difference between gdk_window_create_similar_image_surface and...
 776187 flowbox: Add gtk_flow_box_get_child_at_pos to gtk3
 776306 flowbox: Sometimes emits child-activated during rubberband selection
 776524 GtkAboutDialog: Fix formatting of example email address in html documentation
 776560 icon-browser: window opens at very narrow size, only showing 1 column of \ 
icons
        Fix GL checks to work better on OpenGL ES 2.0
        Avoid a possible crash in ::activate-url handlers
        scrolledwindow: Fix func summary being cut off in bindings using doxygen

* Translation updates:
 German
 Russian

Overview of Changes in GTK+ 3.22.5
==================================

* gtk3-demo now has an example for using PangoTabArray to create a multi-column \ 
layout

* Bug fixes:
 771242 opening menu for certain types of GtkComboBox causes Gdk-CRITICAL \ 
assertion...
 774114 Window shadows are repainted even if only the contents of the window change
 774265 No tilt for wintab devices
 774379 gdk: mingw64 builds segfault during initialization of Huion H610PRO wintab
 774686 GtkMenu does not unref all GtkCheckMenuItem it creates
 774695 GtkProgressbar needs full and empty classes
 774699 list iteration regression causes odd-indexed devices to be ignored \ 
during l...
 774743 GtkNotebook does not unref all GtkBuiltinIcon it creates
 774760 inspector: ensure controller is a GtkGesture
 774790 GtkTextHandle does not unref all GtkAdjustment it references
 774893 Application font sizes scaling gets clamped to 1.00 when starting \ 
GtkInspector
 774915 Destroying the parent of a subsurface causes \ 
_gdk_window_destroy_hierarchy:...
 774917 [wayland] child subsurfaces need to be placed relative to their parent
 774939 GtkLabelAccessible: Initialize link before setting parent
 775212 GtkScaleButton does not unref all GtkAdjustment it references
 775316 gtk_drag_source_set_icon_pixbuf references the pixbuf received once too much
 775319 gdk_window_get_toplevel() fails to return the toplevel of a child subsurface
 775525 gtk_flow_box_get_child_at_index shouldn't crash with an invalid index

* Translation updates:
 Hungarian
 Italian
 Kazakh
 Russian
 Swedish