Feature Request: draw in multiple selected bitmap layers simultaneously

[Herbert123]

Not sure if this would be difficult to implement, but it would be extraordinarily handy.

Currently it is only possible to draw and and use the direct bitmap edit tools on the active bitmap layer. When working on compositions with multiple bitmap layers it would be super handy if we could draw on multiple selected bitmap layers to seamlessly draw in each without the need to switch the active layer.

Vector layers would also benefit from this, but I hazard a guess that it would be more difficult to implement.