[libadwaita] (18 commits) Non-fast-forward update to branch wip/exalm/background-colors2

[Alexander Mikhaylenko <alexm src gnome org>]

The branch 'wip/exalm/background-colors2' 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:

  17f49a6... stylesheet: Clean up assistant sidebar
  d8b9cf1... stylesheet: Remove .sidebar border
  f3acec9... demo: Stop overriding sidebar styles
  50dded9... demo: Add .background to the flap sidebar
  f31a82d... demo: Fix a typo
  ee6ac3a... stylesheet: Remove sidebar background
  b040c8a... stylesheet: Don't explicitly set menu colors
  94a394f... stylesheet: Extract popover colors
  aa34b7d... stylesheet: Extract backdrop headerbar color
  5cbfa3b... stylesheet: Reorganize tab border color
  34c84e2... stylesheet: Move notebook tab color to header instead
  51136d5... stylesheet: Refresh tab bar styles
  0d95974... stylesheet: Use $dark_fg and $light_fg less
  ed8776d... stylesheet: Extract card colors
  c385a44... stylesheet: Unify header bar and dark fill colors
  9b4f8ec... stylesheet: Refresh background colors
  b648c6c... stylesheet: Stop special casing popovers in dark variant

Commits added to the branch:

  1dc240c... Update Finnish translation (*)
  2f03e25... stylesheet: Clean up assistant sidebar
  25ac0df... stylesheet: Remove .sidebar border
  d72a94f... demo: Stop overriding sidebar styles
  4384b9a... demo: Add .background to the flap sidebar
  cd8a13b... demo: Fix a typo
  ad60bd8... stylesheet: Remove sidebar background
  26f97ee... stylesheet: Don't explicitly set menu colors
  8bbcd8a... stylesheet: Extract popover colors
  7cb8699... stylesheet: Extract backdrop headerbar color
  aeb8c4b... stylesheet: Reorganize tab border color
  e152872... stylesheet: Move notebook tab color to header instead
  f081d24... stylesheet: Refresh tab bar styles
  28337e2... stylesheet: Use $dark_fg and $light_fg less
  7dc4836... stylesheet: Extract card colors
  10b6cda... stylesheet: Unify header bar and dark fill colors
  774a6ff... stylesheet: Refresh background colors
  7622a78... stylesheet: Stop special casing popovers in dark variant

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