[gtk] (32 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:

  70de376... window: Replace GtkStyleContext use to get surface transfor
  b267eeb... cssimage: Add gtk_css_image_to_string()
  0dfe19c... gl renderer: Avoid some work when rendering border nodes
  30bb3b5... cssvalue: Make some functions pure
  9bfabfb... cssimage: Make some function pure
  61f759d... GdkRGBA: Make snome functions pure
  724123d... gsk: Make a few functions G_GNUC_PURE
  dcfe1cc... csscolorvalue: Make some functions pure
  ca991d9... GdkTexture: Make get_width/get_height pure
  0053c74... GtkCssImageUrl: Implement is_computed()

Commits added to the branch:

  86aa011... Adwaita: Use child selectors in many more places (*)
  9eadcd8... testsuite: Update mark names (*)
  7e4feb0... colorbutton: Use a css name (*)
  da5d524... css: Print selectors (*)
  00be314... Adwaita: Drop menuitem support (*)
  975fe76... Adwaita: Remove a wildcard rule for tooltips (*)
  5dcce0c... css: Print out relative costs of selectors (*)
  55d08d8... Adwaita: Drop menu remnants (*)
  871959c... Adwaita: Drop selection mode (*)
  16654ee... Merge branch 'matthiasc/for-master' into 'master' (*)
  5b6b4f5... Revert "css: Print out relative costs of selectors" (*)
  53bc1d6... Revert "css: Print selectors" (*)
  4e58541... Make wayland load cursors on demand (*)
  2bc6e1b... Merge branch 'wayland-cursors' into 'master' (*)
  71ee4df... css: Update affects flags for icons (*)
  6e358e2... GtkIcon: Pay attention to style changes (*)
  2ee04ee... GtkPaned: Pay attention to style changes (*)
  a105256... GtkSpinner: Pay attention to style changes (*)
  1eec736... Adwaita: Fix some entry styling (*)
  5d1bd9a... window: Replace GtkStyleContext use to get surface transfor
  b075042... cssimage: Add gtk_css_image_to_string()
  948fae6... gl renderer: Avoid some work when rendering border nodes
  f360b47... cssvalue: Make some functions pure
  d2ed49c... cssimage: Make some function pure
  0107327... GdkRGBA: Make snome functions pure
  9702d1b... gsk: Make a few functions G_GNUC_PURE
  1c215a7... csscolorvalue: Make some functions pure
  53fa807... GdkTexture: Make get_width/get_height pure
  786015d... GtkCssImageUrl: Implement is_computed()
  3094fb9... cssprovider: Parse selectors without a GList
  51aec2f... cssparser: make a few local variables const
  bfe3583... css: Make a few token functions pure

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