- Fixes #11629
- Relates to clean up done as part of #11629 which removed a lot of styling for footer actions which appeared to be unused.
- Re-add some base styling to support the ability for basic customisations where buttons are added within the `extra_footer_actions` block.
- updated the font to its direct use theme and removed -title-height
- removed the 1-time used scss variables and updated directly in the files
- Fixes #11458
Where possible, adopt a subset of stylelint-config-wagtail changes.
- Formatting & ordering (auto applied), this includes the padding/inset shorthand changes
- Adopt a small set of no-union-classes changes as an example of changes to come in future PRs
- Ignore some areas where we are selecting against data* attributes that will not be practical to change
- Move some no-important ignore rules to specific lines
- Ignore max-combinators in modeladmin styles (legacy)
- Remove error messages forced-color-adjust setting to none
- Tweak stylesheets for compatibility with latest stylelint configuration
- Move stylelint config to JS for ease of copying rules with main config
- Enforce scss/no-global-function-names by refactoring code with sass-migrator
- Run Sass code through sass-migrator
- Change stylelint configuration and code to enforce font-family-no-missing-generic-family-keyword
- Manually switch to math.div where migrator used * 0.5
