[gtk] (32 commits) Non-fast-forward update to branch wip/exalm/buttons

[Alexander Mikhaylenko <alexm src gnome org>]

The branch 'wip/exalm/buttons' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  99eab1b... button: Reset style classes when setting arbitrary children
  c5b78fd... menubutton: Reset label when setting icon name and vice ver
  67fee66... menubutton: Check existing value for label and icon name
  6b34233... menubutton: Remove a random g_return_if_fail()
  eb81aa9... menubutton: Add a way to always show arrow with image butto

Commits added to the branch:

  057bda6... macos: register known clipboard types for drag destination (*)
  6c8e176... macos: fix position of drag surface (*)
  b64370c... macos: move drag motion to GdkMacosDrag (*)
  ad12605... macos: check for GdkMacosBaseView before using as such (*)
  6c1dce2... macos: make pasteboard usage reusable (*)
  3fd931d... macos: implement GdkDrop for macOS (*)
  c8ad4d5... dnd: Add another assertion (*)
  4df9314... wayland: Fix some dnd corner case (*)
  92c6485... docs: Tweak wording (*)
  3b70cd3... checkbutton: Match GtkButton behavior (*)
  d7915fb... docs: Add a section about Drag-and-Drop (*)
  1cebf40... docs: Fix a typo (*)
  8897092... Never show the Trash in the FileChooserWidget side bar (*)
  3969d8b... gdk/wayland: Fix pointer-gestures version selection (*)
  981a638... Merge branch 'fix-pointer-gestures-kde-plasma' into 'master (*)
  a4d35ac... gtk: Define the GtkListItem autocleanup func (*)
  1dbb518... macos: fix the position of curosr of input method for macos (*)
  02893e3... Add section about `gtk_widget_set_app_paintable` (*)
  0e29f52... Merge branch 'migration_patch' into 'master' (*)
  85cb550... Merge branch 'gtklistitem-autocleanup' into 'master' (*)
  bbf7454... make testdnd trashcan work again (*)
  0066330... Merge branch 'macos-input-method' into 'master' (*)
  e2cfa7b... Merge branch 'fix_tests_testdnd' into 'master' (*)
  47bd998... Merge branch 'checkbutton-release-outside' into 'master' (*)
  73cb60d... Merge branch 'ebassi/filechooser-no-trash' into 'master' (*)
  6a29b64... Merge branch 'dnd-fixes' into 'master' (*)
  92177d9... Merge branch 'wip/chergert/gdk-macos-gdkdrop' into 'master' (*)
  f3befe5... button: Reset style classes when setting arbitrary children
  76df60d... menubutton: Reset label when setting icon name and vice ver
  51a7545... menubutton: Remove a random g_return_if_fail()
  ac3b246... menubutton: Add a way to always show arrow with image butto
  47b5c68... menubutton: Don't hardcode label<->arrow spacing

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