Added invite link to menu

invite link goes to stub page, need to figure out email invite system
probably open email client with preset message, maybe some social
sharing links here as well. slightly changed the lighter grey used in
the “tiles” background helps each lot feel more like a cohesive block,
especially when viewing on iPhone where they bleed to the edges.
Started modifying the 3 “actions” on the dashboard, I’m envisioning a
graphic icon on all three above the text, or maybe to the left. Need to
make the icons, but wanted to check in for the night!