Log Message:
gtk3: update to 3.22.1

3.22.21:

* Bugs fixed:
 738893 ComboBox in appears-as-list mode: Finishing scroll with mouse causes...
 786613 Adwaita: provide a generic sidebar icon and label styling
 787172 EmojiChooser: Improve selection of section buttons
 787279 EmojiChooser: Hovered emoji become impossible to see in HighContrast...
 787280 HighContrast: Fix regression in vertical separator in titlebar headerbar
 787410 entry: fix memory leak

* Translation updates