Version 3.22.0
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- Out of process applets are no longer supported.
- GObject introspection support is removed.
- Fix user switching with GDM. (Alberts Muktupāvels; #769009)
- Disable scaling support in GTK+.
- Fix cropped pixbuf rendering during zoom animation (Yannick Gicquel; #771166)
- Fake transparency has been replaced with real transparency.
- New panel properties dialog - background settings has been replaced with
  theme settings.