[gtk] (3 commits) Non-fast-forward update to branch wip/jimmac/gtk3-public-hc-colors

[Jakub Steiner <jimmac src gnome org>]

The branch 'wip/jimmac/gtk3-public-hc-colors' 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:

  87559f2... HC: export public colors

Commits added to the branch:

  30906f3... Adwaita: lower glyph contrast for checkboxes (*)
  1f9f370... Merge branch 'wip/jimmac/gtk3-uniform-checkboxes' into 'gtk (*)
  16b4ae8... HC: export public colors

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