Sync with Greybird 3.23.1
- Add initial support for Gtk4 and libhandy
- Fix dark xfwm4-a11y install path
- Fix xfwm4-a11y and xfwm4-compact install path
- Fix: GtkLabel:
Backdropped selection color adjusted - Fix: Backdropped selection:
GtkListBoxes weren't grey - Hotfix: removed background color for non-bg items
- Gtk3: Adjusted selected backdrop fg/bg colors: shades of grey.
- Changes the xfwm4 border colors
- build: refactor meson
- Correct gradients for horizontal scrollbars
- Reduce messagedialog buttonbox size
- Make CSD titlebars slimmer
- Correct gradients for horizontal scrollbars (shimmerproject/Greybird#288)
- Greybird-Dark titlebar decorations now match their CSD counterparts (shimmerproject/Greybird#301)
- Background selection colors are now grey instead of blue for better readability