Overview of Changes in GTK+ 3.11.6 to 3.11.7
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* GtkActionBar:
 - Fix theming

* GtkBox:
 - Allow setting center widget to NULL
 - Fix a size-allocation error

* GtkPopover:
 - Fix a crash with text handles (#724392)
 - Allow resetting relative-to  (#724407)

* Wayland:
 - Use new xdg-shell ping
 - Use new xdg-shell focus methods

* Printing:
 - Fix a small memory leak (#724631)


Overview of Changes in GTK+ 3.11.5 to 3.11.6