Log Message:
gtk3+: update to 3.24.17.

Overview of Changes in GTK+ 3.24.17
===================================

* GtkFileChooser: Fix some keynav issues

* GtkMenuButton: disable focus-on-click

* Derive the HighContrast and HighContrastInverse themes from Adwaita

* Wayland:
 - Fix firefox sizing problems
 - Prevent Alt lingering after Alt-Tab
 - Load compose sequences from ~/.Compose
 - Fix a crash in the Wayland input method

* Translation updates
 Finnish
 Hebrew