Switch gaming group refactored

Now you can create a new gaming group from top dropdown menu.
Also, a lot of cleaning and testing code :)

FlipScroll tables on Mobile and GTM improvements

2.1.1

Last flipscroll UI fixes

Distinct Gaming Groups on Home Page

Recent public games on the home page will now only show 1 Played Game per Gaming Group so that it's more colorful and diverse.

Show BGG Thumbnails on Player Details

Merge pull request #298 from NemeStats/297-BGG-Thumbnail-Fix

nwo shows BGG thumbnail on player recent games

Win Percent On Gaming Group

Now shows win percentage on the Gaming Group details page.