## Issue
`normalizeUri` | `parseURI` is expensive and has been causing sluggish operations when called repeatedly or within a loop.
## Change
Since I'm not confident enough to remove the call entirely from makeSelectClaimIsMine (although I've yet to find a scenario that the uri is not already normalized), we'll try caching the calls instead.
## Results
- in a simple test of toggling between 2 category pages, we saved 20ms from `parseURI` calls alone.
- in a test of opening all categories one time, the memory usage remained similar. This makes sense since we removed a `makeSelect*` (which creates a selector for each call + not memoizing), and replaced that with a cached selector that's actually memoizing.
* 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
