Reboot updates

- Remove unsupported browsers fixes
- More consistent comment blocks
- Reorganise order of some blocks
- Add height fix for date/month/week/time inputs (#18842)
- Remove redundant type selectors
- Additional resets and theming options for `legend`
- Add date & color inputs to reboot page
- Use the same borders for text search, text inputs, textareas and date inputs
- Move code styling to reboot

build/vnu-jar.js

@@ -33,6 +33,10 @@ childProcess.exec('java -version', (error, stdout, stderr) => {
     // Content → Reboot uses various date/time inputs as a visual example.
     // Documentation does not rely on them being usable.
     'The “date” input type is not supported in all browsers.*',
+    'The “week” input type is not supported in all browsers.*',
+    'The “month” input type is not supported in all browsers.*',
+    'The “color” input type is not supported in all browsers.*',
+    'The “datetime-local” input type is not supported in all browsers.*',
     'The “time” input type is not supported in all browsers.*',
     // IE11 doesn't recognise <main> / give the element an implicit "main" landmark.
     // Explicit role="main" is redundant for other modern browsers, but still valid.