Split up UserSettings BC (move request forwarding to appropriate plugins) & split up the tests for that BC.

Re-add backwards compatibility for URLs using old UserSettings plugin + add test coverage so BC break will be detected in the future.

Having proper HTML titles  increase usability and is important
eg. one can more easily find the right tag in the list of browser tabs

Konquerer -> Konqueror

removed default information from plugin.json files; move plugin descriptions to language files, where available