## Issue
Closes 385
## Approach
As mentioned in the ticket, the current places where that info is needed is in the Invites Page and Social Share Component.
1. Invites Page: it is already doing the fetch on mount, so no issue there.
2. Social Share: show spinner until the data is fetched.
enable visiting /$/CODE or /$/invite/CHANNEL
enable visiting /ANY?=[CODE|CHANNEL] to set and claim
enable /$/invite selecting channels for referral codes
add ?r=CODE to share modal
enable setting referrer and claiming reward from rewards page
