function requestFullscreen(element) {
	if (hasFullscreenSupport && !isFullscreen()) {
		element = element || getParent();
		element.requestFullscreen =
			prefixed("requestFullscreen", element) || element.mozRequestFullScreen;
		element.requestFullscreen();
	}
}
Triggers a fullscreen request. Requires fullscreen support from the browser/device.
@memberof device
@param {Element} [element] - the element to be set in full-screen mode.
@example
// add a keyboard shortcut to toggle Fullscreen mode on/off
me.input.bindKey(me.input.KEY.F, "toggleFullscreen");
me.event.on(me.event.KEYDOWN, function (action, keyCode, edge) {
   // toggle fullscreen on/off
   if (action === "toggleFullscreen") {
      me.device.requestFullscreen();
   } else {
      me.device.exitFullscreen();
   }
});