Migrate wiki-screen rules about notes and warnings
Migrate button styles from wiki-screen.css
Migrate #article-head from wiki-screen.css
Merge pull request #2324 from openjck/wiki-screen-notes-warnings

Migrate wiki-screen rules about notes and warnings
Merge pull request #2334 from openjck/migrate-button-styles

Migrate button styles from wiki-screen.css
Merge pull request #2337 from openjck/migrate-article-head

Migrate #article-head from wiki-screen.css
Move #deki-page-tags, #page-comment, content rules
Migrate revision deletion rules from wiki-screen
Migrate multi-column rules from wiki-screen