Fix shortcut key toggle issue

[SwordHand]

Fixing the issue where the Windows pause shortcut key is not working.

[mikelxk]

Looks good,
I just don't know why it could fix the issue thou

listen1_chrome_extension/js/l1_player.js

Lines 27 to 35 in 3f24efa

	togglePlayPause() {
	getPlayerAsync(mode, (player) => {
	if (player.playing) {
	player.pause();
	} else {
	player.play();
	}
	});
	},

Maybe it's because we're using $scope instead of getPlayerAsync ?
If that's the case, it's better we fix that instead.