Add `FlxG.touches.pressed` and `FlxG.touches.anyPressed`

[Geokureli]

I was under the impression that all touches in FlxG.touches.list were in a justPressed, pressed and justReleased state, but apparently they exist in a released state before they are removed. This threw me for a loop when debugging some code. Given that we have FlxG.touches.justStarted maybe we should have lists for all other states.

Additionally, I think FlxTouchManager could benefit from boolean flags for whether any touch is in the target state. such as: FlxG.touches.anyJustPressed