[gimp] (3 commits) Non-fast-forward update to branch wip/wormnest/fix-themes-windows

[Jehan <jehanp src gnome org>]

The branch 'wip/wormnest/fix-themes-windows' 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:

  acee6dc... fix: themes_theme_change_notify: error parsing theme.css on

Commits added to the branch:

  2e73e30... libgimp: 'gimp_ui' as priority prefix for GimpUi introspect (*)
  9c90ab4... MR !343: using GimpUi prefix in Vala plug-ins too. (*)
  9acefd2... fix: themes_theme_change_notify: error parsing theme.css on

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