* Discover: add persistence to the livestream section's fold state
The persisted value should only apply when livestream section is needed, hence the need for 2 state variables.
Also renamed the variables for clarity.
* Discover: add "show less livestreams" at upper-right
Wanted to put it as an injected tile, but requires more work to do it in a general-purpose way, as opposed to a hardcoded way like how ads are currently injected. It also needs to work on both Tile and List format.
So ... just place the button at the upper-right for now. Although a bit odd, at least it'll be a consistent place (i.e. position won't be affected by live tile count).
935eaa6edb