[libadwaita] (10 commits) Non-fast-forward update to branch wip/exalm/borderless-preparations

[Adrien Plazas <aplazas src gnome org>]

The branch 'wip/exalm/borderless-preparations' 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:

  5a42518... stylesheet: Brighten accent/destructive_colors in light var
  6a59148... stylesheet: Remove redundant undecorated button rules
  b5370d3... stylesheet: Specificity bump for view switcher buttons
  a76851f... stylesheet: Make buttons bold
  4abe024... stylesheet: Revert the linked style back
  e08b994... stylesheet: Use 6px padding and spacing for toolbars

Commits added to the branch:

  27e82dd... doc: Make API changes brought by AdwViewStack more explicit (*)
  4119428... view-stack: Make transition_duration a macro (*)
  f26b99f... view-stack: Better describe the widget (*)
  c3c2b6d... Add missing periods to short class descriptions (*)
  067d983... stylesheet: Brighten accent/destructive_colors in light var
  5d1fd3a... stylesheet: Remove redundant undecorated button rules
  4eda2ec... stylesheet: Specificity bump for view switcher buttons
  a9bc9d2... stylesheet: Make buttons bold
  818b565... stylesheet: Revert the linked style back
  3aa34fe... stylesheet: Use 6px padding and spacing for toolbars

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