[libadwaita] (20 commits) ...demo-window: Consistently use swapped="yes" for signal handlers

[Christopher Davis <christopherdavis src gnome org>]

Summary of changes:

  ace5990... demo: Remove unused styles (*)
  69fa0df... demo: Clean up animation sample style (*)
  5db320d... demo: Split welcome page into a separate class (*)
  d6e6e86... demo: Split leaflet page into a separate class (*)
  b4da3cc... demo: Split clamp page into a separate class (*)
  f7d7198... demo: Split lists page into a separate class (*)
  324754d... demo: Split view switcher page into a separate class (*)
  b80181d... demo: Split carousel page into a separate class (*)
  9972f8c... demo: Split avatar page into a separate class (*)
  e170f01... demo: Split flap page into a separate class (*)
  994275e... demo: Split tab view page into a separate class (*)
  08aa4c5... demo: Split buttons page into a separate class (*)
  3e61e8d... demo: Split styles page into a separate class (*)
  c1f7388... demo: Rename Toast to Toasts (*)
  c23f3b5... demo: Split toasts page into a separate class (*)
  30d1855... demo: Split animations page into a separate class (*)
  fce625b... demo: Clean up AdwDemoWindow (*)
  24fdca7... demo-window: Remove unused ids from template (*)
  18b8b2b... demo-window: Rename content_box to main_leaflet (*)
  a0fadd9... demo-window: Consistently use swapped="yes" for signal hand (*)

(*) This commit already existed in another branch; no separate mail sent