Log Message:
gimp: Update to 2.10.30

Changelog:
Overview of Changes from GIMP 2.10.28 to GIMP 2.10.30
=====================================================

Core:

  - Do not follow subpixel font rendering choice from system settings
    for text layer rendering. These systems are useful for GUI
    rendering on a screen of a specific type and pixel order. Yet when
    rendering an image which can be zoomed in or out, showed on various
    screens or even printed, subpixel font rendering doesn't make sense.
  - Rewrite the core selection drawing logics so that it works on macOS
    Big Sur and over. This is a backport (adapted to GTK+2) of the fix
    brought in GIMP 2.99.8 for Wayland and macOS.
  - Ignore MakerNote metadata tag at export and only store the tags that
    go in it, hence avoiding partial invalid metadata.
  - Color picking from Colors dockable can now use the Freedesktop
    portal.
  - On Windows, move from GetICMProfile() to WcsGetDefaultColorProfile()
    because the former is broken in Windows 11.

Plug-ins:

  - metadata-viewer: improve how XMP tags with multiple values are
    handled and shown (now each value on a separate line for better
    readability).
  - metadata-editor:
    * XMP array tags of type BAG and SEQ are now on separate lines.
    * Comparing XMP tags with equivalent IPTC tags with multiple values,
      each value is compared individually, instead of comparing the list
      as a whole.
  - Many robustness improvements and other fixes to the metadata
    plug-ins.
  - AVIF: prefer AOM encoder for export.
  - PSD:
    * Skip sanity check for mask of rendered layers as some layer mask
      have invalid dimensions in such cases. They will now be loaded
      correctly.
    * Fixed loading of CMYK PSD files without alpha.
    * Fixed loading of CMYK images without layers.
    * Fixed loading of merged image of a 16 bit per channel RGBA PSD
      file with the alpha channel opaque.
   - PBM: large file export now always works and does not depend anymore
     on the platform's long int size.
   - Screenshot:
     * GNOME shell implementation dropped because the D-Bus API has been
       restricted to core components for security reasons, thus our
       plug-in was failing.
     * KDE portal moved as last fallback after the X implementation
       (when running on X) and Freedesktop portal, because KDE is also
       starting to block API calls for security reasons.

Installer:

  - Extension .avif now associated to GIMP.
  - Drop codepage conversion, use UTF-8 for language files.

Build:

  - macOS support officially bumped to macOS 10.12 (Sierra). We would
    usually try to avoid doing this within a stable release but the
    conditions (lack of contributors) is such that it is hard to avoid.