Reload behaviour taxiway signs

I removed some taxiway signs at Frankfurt and i got really up set as the SDK reloads the taxiway signs and generic senery every time when i removed or added one of them.

Can you please rework the code and logic how taxiway signs will be live updated in the SDK. This would be a great help when someone is doing new or editing airport taxiway signs.

Generally, the scenery redraw behavoir in DevMode has room for improvements. It takes many seconds and often needs zooming in/out as well before taxiway lighting changes has an effect.