Add player game reset control

[timotheeg]

When one player has a read or camera issue in competition layout, the only way to fix it is either to refresh the producer, renderer or both. Refreshing the renderer is always a pain because it drops running game stats like EFF, TRT, and running Tetris rate.

TODO: dd a button in the admin panel that instructs the producer and the renderer to reset their interactions:

• Game stats would restart for the player
• Player cam would do a fresh call to the renderer

[timotheeg]

Player cam reset is done.

Stats reset not yet.