Changes:
- removed ugly PopupsContext::getInstance
- removed ugly PopupsContextTestWrapper helper
- defined all services inside ServiceWirings
- fixed unit tests to test classes directly or use MediawikiServices
Change-Id: Ie27e28bb07aebe01014848c290369b1b1f098e9b
Changes:
- introduced new UserPreferencesChangeHandler class that listens to
PreferencesFormPreSave hook
- introduced wrapper for EventLogging extension plus NullLogger when
EventLogging extension is not availalbe
- when user changes PagePreview to disabled system will trigger
disabled event
Bug: T167365
Change-Id: I63faecb0495eb30a9fc2763e7ddf3944baf7f55a