Hide the QPIndicator when the connexion quality is good and the control div when in fullscreen

[DenisTensorWorks]

Originally opened by @TxMat

Component your feature request relates to

• Frontend UI library

Problem your feature solves? Please describe.
While the default UI being very clean already, the persistant presence of the controls button and Video QP Indicator even in fullscreen causes a lot of clutter on the game view and can be distracting for players.

Describe the solution you'd like
It'll be nice to have options to tweak to behaviors of these components by hiding them in full screen or only show the connexion indicator when the quality is bad to alert the player.

Additional context
I've tried implementing these changes myself by tinkering with the library
disclaimer : i am not a typescript dev and my changes are probably a bit wonky

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Moved from EpicGames/PixelStreamingInfrastructure#496

[lukehb]

When we get round to implementing this we should add new frontend settings for each of these requests. (This is more modular than just hiding all the UI)