It is clear where the issues we have with CCBUG:408872 come from,
so there's no need to be able to override the angle backend anymore.

Everytime we add a docker, we need to do this, otherwise the new
docker will be shown by default.

This is so I can experiment with the warp rasterizer.

CCBUG:408872

BUG:408749

Only active window should restart isolated mode, not all of them

BUG:408150

I found myself getting confused by the three places where we install
similar icons

This was only used in Karbon's on-screen gradient editor, where it
also never worked really well.

https://developer.apple.com/library/archive/qa/qa1734/_index.html
suggests that this will make it possible for Krita to use the
integrated Intel GPU instead of the discrete AMD GPU. AMD drivers
on macOS are the pits, using Intel should be preferred for Krita

CCBUG:409052

5.12.4 seems to be the reason for unexpected crashes during scrolling.

Otherwise, there is a deadlock

BUG:408843

BUG:409133

Doing so breaks the plasma qpa so the global menu plasmoid doesn't
work anymore.

BUG:408015
Differential Revision: https://phabricator.kde.org/D21886
Patch by David Edmundson, thanks!

BUG:408887

This reverts commit 103d4b79.

Map filter.
Allows dithered blending between stop colours without introducing any
new colours which is desirable for pixel art.

Moved dither functionality/ui out of Palettize filter into KisDitherUtil
and KisDitherWidget.

CCBUG:408887

BUG:290383

There was a crash caused by not checking if anything is on the reference
images layer before updating it. This commit fixes this behaviour.
Reference images should still load just fine.

BUG:408927

Only set image as modified if the undo index is not in the
clean state.

BUG:402263

* Remove stray comment

The default tool has many actions that are not suitable for the
reference image tool, so we only re-use the actions that are
needed.

BUG:408427

I doubt this helps with 408872, but it's a good idea to do in
any case.

CCBUG:408872