Add a "Find a Group" button to the groups sidebar

https://www.evernote.com/l/AGsgnhEHCnxBO4-OxTEqKWxBpcWCbCR5fPIB/image.png

When a user has less than 12 groups on the side bar, show our groups icon with a round border on the bottom. This button should go to

https://www.minds.com/newsfeed/global/top;period=12h;type=groups;all=1

• a group button on the sidebar
• unit tests
• end to end tests