* use wrappedJSObject to create style elements in page context
* skip unnecessary polyfills in content scripts
* group all style management stuff in injector
* support all API methods in content scripts
* Refactor: style injector/docRootObserver/docRewriteObserver
* Fix: minor
* Fix: disabled state
* Fix: use evade
* Fix: apply.js is broken in our pages
* Fix: transition patch is broken
* Fix: also check elements after the last userstyle
* Fix: remove outdated FIXME. styleInjector.toggle now toggle all styles
* Fix: call Object.keys twice
* Add a fixme
* Fix: typo
* Add a fixme
* Fix: don't argue for mutations generated by other extensions
