Change to fully dynamic Delegate, Stateful Region Feature

[texone]

Rework invoking in vl, delegates and stateful regions are powerful features of the vl language this should be handled more flexible

in the node browser there should just be one invoke when you add a dialog appears

here you can decide first if you want to have a delegate or stateful region

you define the name of the region

you than define the number types and names of the inputs and outputs

Also with this dialog you should be able to reconfigure an existing invoke any time

we would have the following benefits
reduce the nodes needed
make one consistent interface for delegates and stateful regions
make those regions more readible by having more meaning names than input1 etc and a clear region name