[gimp] (28 commits) Non-fast-forward update to branch wip/simon/palettestuff

[Simon Budig <simon src gnome org>]

The branch 'wip/simon/palettestuff' 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:

  e355bc7... Get rid of image->n_colors and image->colormap
  960eadd... remove the ->position entry from GimpPaletteEntry

Commits added to the branch:

  62a76d7... app: new welcome dialog to appear only at first launch afte (*)
  5628b9a... app: now store the last run version in the core config. (*)
  7511c81... data: new "experiments" splash screen for GIMP 2.99.10. (*)
  1f9057d... app: rename "last-run-version" property by simpler "config- (*)
  d31d417... app: make sure the welcome dialog is centered on the GIMP m (*)
  b4b41f7... NEWS: update. (*)
  e5509ff... app: fix sentence and typo. (*)
  f32bca6... app: trying a new logic for the image size of the welcome d (*)
  526271d... desktop: update release date. (*)
  25344cd... Update Swedish translation (*)
  618e11e... Release development version GIMP 2.99.10. (*)
  64bf804... configure.ac, meson.build: post-release version bump to 2.9 (*)
  69167b6... Update Russian translation (*)
  eb0dd2e... Update Ukrainian translation (*)
  a128210... Update Portuguese translation (*)
  aaafa86... devel-docs: add some information about theming. (*)
  eb9b936... app: let's also check the appstream in the legacy location  (*)
  140ce80... devel-docs: typo fix. (*)
  271d6a0... build: fix libjxl compilation (*)
  82af34e... NEWS: update translations for GIMP 2.99.10. (*)
  ca050d4... Update Chinese (China) translation (*)
  4c73b49... Update Basque translation (*)
  cba9389... Update Basque translation (*)
  aa007e1... Update Slovenian translation (*)
  fedc548... Update Slovenian translation (*)
  a0d65b8... AUTHORS: update. (*)
  23e50ae... Get rid of image->n_colors and image->colormap
  5e01351... remove the ->position entry from GimpPaletteEntry

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