chore(shared): Changes kiosk/expand/flags/header

- Revamped the flags ui to be consistent with the rest
- The expand setting is on by default now. Tweaks to its dialog and
  header
- Added a new kiosk mode that will use the entire screen for the
  workbench
- Got rid of the auto-hiding behaviour of the header which gets annoying
  quick

sites/shared/components/workbench/menus/ui-settings/values.mjs

@@ -2,6 +2,7 @@ import { Difficulty } from 'shared/components/designs/difficulty.mjs'
 import { ListValue } from '../shared/values.mjs'
 
 export const values = {
-  renderer: ListValue,
   control: ({ control }) => <Difficulty score={control} color="primary" />,
+  kiosk: ListValue,
+  renderer: ListValue,
 }