[libadwaita] (14 commits) Non-fast-forward update to branch wip/exalm/revert-headers

[Alexander Mikhaylenko <alexm src gnome org>]

The branch 'wip/exalm/revert-headers' 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:

  0e78577... Revert "stylesheet: Add back a backdrop state for AdwTabBar
  addfef2... Revert "stylesheet: Restore a backdrop state for header bar
  ef5c4ea... stylesheet: Use darker headerbar for focused windows

Commits added to the branch:

  1a1c565... tab-view: Set can-target to false during dnd and not can-fo (*)
  51b8ab0... stylesheet: Fix message dialog action area (*)
  6d9dfb1... stylesheet: Fix menubutton.osd style (*)
  5879f42... stylesheet: Fix osd menu button popovers (*)
  8a38bb0... stylesheet: Support .circular, .flat and .outline for menu  (*)
  c974df0... stylesheet: Rename accent_color/text to accent_bg/fg_color (*)
  bfcebe7... stylesheet: Rename destructive_color/text to destructive_bg (*)
  4aa6903... Rename standalone accent/destructive colors and expose them (*)
  7eb0eea... doc: Update the migration guide (*)
  fce1de5... Specify the libawaita building branch (*)
  bdac6c0... gitignore: Ignore subproject checkout directories (*)
  481497d... Revert "stylesheet: Add back a backdrop state for AdwTabBar
  3f90b4d... Revert "stylesheet: Restore a backdrop state for header bar
  4d873ad... stylesheet: Use darker headerbar for focused windows

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