4.12.0 (stable):

Gtk:
* AboutDialog: Deprecate ctor with use_header_bar.
  (Daniel Boles) Merge request !74
* Add SymbolicPaintable.
* Add ScrollInfo and enum ListScrollFlags.
* ColumnView, GridView, ListView, Viewport: Add scroll_to().
* ColumnViewRow, ListItem: Add set/get/property_accessible_description()
  and set/get/property_accessible_label().
* DropDown: Add set/get/property_header_factory()
  and set/get/property_search_match_mode().
* FileLauncher: Add set/get/property_always_ask().
* Window: Add is_suspended() and property_suspened().
  (Kjell Ahlstedt)

Documentation:
* Remove README.SUN and other obsolete files
  (Kjell Ahlstedt) Issue #140
* Gtk::Widget: Describe managed and non-managed widgets
  (Kjell Ahlstedt) Issue #138 (Daniel Boles)

Build:
* recentinfo.hg: Fix Visual Studio build
  (Chun-wei Fan) Merge request !75
* Require gtk4 >= 4.12.0
  (Kjell Ahlstedt)