We already have a pre-calculated map, but not used except for comments.
At the expense of pre-calculating it, the subsequent queries are instantaneous compared to the loop.
We are still not perfect in term of reducing re-renders, so this helps a lot.
## Mistake
Tried to simplify the logic between checking Channel vs Content claim, and ended up always checking against Channel. This is correct for commentron blocklists, but not blacklists where the txid is per claim.
## Changes
- Restored original logic.
- While at it, restore the usage of `selectClaimForUri` (i.e. no need to split into 4 selectors anymore), since we've updated the reducer to prevent invalidation from things like 'confirmation' and 'is_my_output'.
## Issue
- Each tile was checking against 4 blocklists (blacklisted, filtered, muted, commentron) on every render. Loading the front-page with Cheese alone caused 1400 calls.
- This is also part of the reason why pressing Back into the tile list takes forever.
## Fix
Since we still need to perform the checks at the app side for now, tried to memoize the operation through a selector.
