Resolves #11531

GtkListBox's CSS was previously defined, but GtkListBoxRow
did not inherit those values. This patch explicitly defines this
so we do not have system theme leaks.

For now, we can't keep certain GEGL ops
like Gradient as NDE filters, since they are
connected to tools. If the layer is copied
or saved as an .XCF while the tool is still
active, it attempts to save it and causes a
crash.
This patch adds a check to make sure the
copied filter has been commited and that
it's not a tool-based NDE filter before
being copied. It also adds some NULL
checks where gimp_drawable_filter_duplicate
is used to prevent NULL from being
added to the filter stack.

Lua-lgi works with Lua 5.4 meanwhile which is the only implementation on
some architectures.

Signed-off-by: Nils Philippsen <nils@tiptoe.de>

As noted by Anders Jonsson, the wrong parameter description
was removed when the API was updated. Other aspects of the
descriptions were also updated to account for the change.

After 443947c6, the image layers were being passed as a
GList to the internal GIH export code rather than GimpDrawable
pointers.

The memsize argument was missing an `(out)` argument

Make sure to mark the data argument in `gimp_config_writer_data()` as an
array.

Bruno authored May 06, 2024 and Bruno committed May 08, 2024

* Since the appimage is for testing purposes, let's use system 'libc'
* Hardcode python path since the wildcard wasn't expanding misteriously
* Improve system theme recognition making way simpler

Michael Schumacher authored May 06, 2024 and Jehan committed May 05, 2024

This may help to reduce the number of duplicate reports we get about some (temporarily) frequently reported issues, like the current crash
happening since GLib 2.79/2.80, or the crash happening with older GIMP versions on macOS Sonoma.

This won't be perfect because not everyone will use or read the template, or notice the url in it, or use the url to find and check the
reports, but I count on it getting more known than right now.

This avoids jiggeling baselines for texts with/without descenders.

file plug-in testing.
The name and location of the xml results will be the same as for the
log file, but with the extension replaced by .xml.

Just some basic support is added which adds failed testcases when
a plug-in has a failure result, which should be the most common
case of failures.
Not all cases where we make errors in our test setup will generate
failed testcases yet, although they should show up in the number of
failures.
Disabled tests won't show up as skipped tests.
We also don't track time.