all code for Milestone 2.0

[jho44]

Fixes issues:

• Add "Mark all days as busy" button below scheduling table #34
• After clicking an expired link, show a message on the login page that the link has expired and prefill #35
• Text FAQ profile link when a friend request is accepted #57
• newly added: Text schedule when a friend request is accepted #54
• 9/23 newly added: Highlight date rows with availability everywhere #38
• 9/23 newly added: Add "Delete them for real?" confirmation dialog when you delete someone from your circle or household #61

9/25 LATEST EDIT: this PR resolves all issues in milestone 2 (except for the vid)

NOTE: 57 and 54 are sent as 2 separate text msgs

[lilith]

This all looks good to me, thank you!