Directly coloring labels can create a lot of unintended behaviors.
Unfortunately we can't avoid directly coloring label:disabled because
it can be used individually. This, however, tries to inherit color from
the parent element of labels wherever possible.
Fixes #1643 (closed)
Before/After:
This also fixes the button's label color on the selected row;
and also fixes the modelbutton's label color when an app has .devel class (only happened in gtk4):
