[gtk] (17 commits) Non-fast-forward update to branch wip/baedert/for-master

[Timm Bäder <baedert src gnome org>]

The branch 'wip/baedert/for-master' 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:

  cbbff99... renderborder: Make simple border case more obvious
  dee1209... Start using GtkWidget's new style class API
  0e02997... snapshot: Add _push_collect() and _pop_collect()
  b179c50... widget: Use gtk_snapshot_{push,pop})_collect
  111f5d7... widget: Fix a from_string/try_string mixup
  9ac4074... GskRoundedRect: Inline graphene_rect_contains_rect
  11a6a16... textlayout: Use gtk_snapshot_{push,pop}_collect()
  cb96bcf... snapshot: Remove new_with_parent
  bfe08ce... GskTransform: add assertions to make normalize_angle() inte
  b9ed8a6... GskTransform: Remove useless fmod check
  3958f24... style context: Remove parent relationship
  9becd0c... widget: Create style context in _init
  6f65553... {box,grid}layout: Access border spacing directly
  29b1233... calendar: Fix an uninitialized value
  e0c5a21... tooltipwindow: Don't manually validate the css node
  99373f7... Adwaita: Fix levelbar styling
  12e429e... calendar: Remove details

Commits added to the branch:

  461f5e6... renderborder: Make simple border case more obvious
  132f0ed... Start using GtkWidget's new style class API
  789aa86... snapshot: Add _push_collect() and _pop_collect()
  815e0ef... widget: Use gtk_snapshot_{push,pop})_collect
  362d08d... widget: Fix a from_string/try_string mixup
  3d96770... GskRoundedRect: Inline graphene_rect_contains_rect
  61e2675... textlayout: Use gtk_snapshot_{push,pop}_collect()
  e81b306... snapshot: Remove new_with_parent
  bff65cc... GskTransform: add assertions to make normalize_angle() inte
  769d5f1... GskTransform: Remove useless fmod check
  a318025... style context: Remove parent relationship
  d609121... widget: Create style context in _init
  2fb08b7... {box,grid}layout: Access border spacing directly
  4e6ddb5... calendar: Fix an uninitialized value
  7306d9c... tooltipwindow: Don't manually validate the css node
  373d1ae... Adwaita: Fix levelbar styling
  1e9f164... calendar: Remove details