[gimp] (10 commits) Non-fast-forward update to branch wip/Jehan/incremental-win-installer-improvements

[Jehan <jehanp src gnome org>]

The branch 'wip/Jehan/incremental-win-installer-improvements' 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:

  bfa26bb... build: custom GTK3 compilation for the Windows installer.
  8d9b15d... Plop.

Commits added to the branch:

  f5eed26... Update Ukrainian translation (*)
  36f103c... desktop: install a scalable GIMP icon too. (*)
  3598562... app, libgimpwidgets: drop the thumbnail icon feature. (*)
  b7c2fbe... desktop: install 64x64 app icon. (*)
  8025962... libgimpwidgets: fix meson/mingw-w64 build and relocatable b (*)
  fe329ad... gitlab-ci: install GIMP before running `make check`. (*)
  97ae281... Revert "gitlab-ci: install GIMP before running `make check` (*)
  2d80159... desktop: add scalable/gimp.svg to distributed tarball. (*)
  4a00a99... libgimpwidgets: use g_printerr() instead of g_warning() for (*)
  c902058... build: custom GTK3 compilation for the Windows installer.

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