RecommendedContent: prevent excessive render
RecommendedContent: prevent excessive render

## Issue
When seeking on a video, RecommendedContent gets re-rendered, which causes the 20 ClaimPreviews to be re-rendered, several times. ClaimPreview has lots of children, plus it's constantly checking against the blacklist, among other things.

## Fix
The culprit seems to be the `recommendedContent` array -- the address may be different, but the contents are the same.
Do a deep compare instead.

lbryio/lbry-app,lbryio/lbry-app