## Issue
534 prevent new channel creation over x channels
## Notes
Also handled from the API call (`doCreateChannel`) in case there are other UI components that create channels.
* initial support for block/mute
* hide blocked + muted content everywhere
* add info message for blocked/muted characteristics
* sort blocked list by most recent block first
* add 'blocked' message on channel page for channels that you have blocked
* cleanup
* delete unused files
* always pass mute/block list to claim_search on homepage
* PR cleanup
