* Use translations from manifest to prompt to install lang pack

* Add missing file

* Use the right key

* Remove unused variables

* Improve messaging

The UI is weird and maybe it's not necessary. Could use a checkbox in the header instead

Settings editor - Get rid of green highlight on setting title. Keep it on the "modified" label next to the setting title.

Currently we can't use `/\p{L}/u` which would let use use a whitelist instead

Fixes #37079

Fixes #48482

Attempts to make described workaround from issue #45226

Fixes #49379

#50414 - Give settings editor tree its own stylesheet so it can be styled independently from other trees