Improvements and fixes

In this version some redundant code has been removed, the YouTube player now handles the thumbnail image correctly so there is no reason to impact performance by doing the same thing again via YT+. It was also brought to my attention that the subtitles remained on whenever the user was choosing not to disable them, this was a forgotten mistake left from pre-stable builds which had toggling options instead of boolean. The same issue was present for the annotations' option.

Also the initiation process has been enhanced, this is a trial to see wether it will work better with slower connections and the occasional Chrome injection lag, the focus is to mitigate the starting delay or failure observed in the mentioned cases. If it doesn't benefit the experience, the previous behavior will be restored.