can cancel random requestAnimFrame() calback on hide()/pause()

[RomanLut]

frameID is assigned setTimeout() handle in requestRender() and then
cancelAnimationFrame(frameID) is called in pause().

Handles from setTimeout() should not be used with cancelAnimationFrame().

In my case, where I created and hided FPSMetter at game start, it killed PIXI's requestAnimationFrame callback sometimes. Chances to get handles with same value from setTimeout() and requestAnimationFrame() are high at application start.

[ZumiKua]

Same issues here, when using this with PIXI, PIXI.ticker.shared's _tick callback is canceled because of this bug.