Anki add-on: Modified reviewer context menu search with browser search

The same more or less as the Anki 2.1 Reviewer Context Menu Search ( https://ankiweb.net/shared/info/359618071 ) but made to look more like the Anki 2.0 glutanimate version ( https://ankiweb.net/shared/info/869824347 ) with browser search included. ***The UpToDate link is specific to USC student authentication but can easily be changed in the .py file by changing the url for UpToDate***