BREAKING CHANGE: This deprecates the IS-(MAC|WINDOWS|LINUX|BSD) family
of global constants in favor of a native `featurep` check:
IS-MAC -> (featurep :system 'macos)
IS-WINDOWS -> (featurep :system 'windows)
IS-LINUX -> (featurep :system 'linux)
IS-BSD -> (featurep :system 'bsd)
The constants will stick around until the v3 release so folks can still
use it -- and there are still some modules that use it, but I'll phase
those uses out gradually.
Fix: #7479
In the leuven theme (and possibly others), the use of
`(mode-line-emphasis bold)` results in white text on a white background,
making the shortcut keys invisible.
The original function mu4e--main-action-string uses mu4e-highlight-face,
and changing back to this fixes the problem.
I can’t tell from the git history what the reasoning for the face change
specifically was: the new function seems to have been made mainly for
changing the bullets to unicode versions.
Fix: #7010
