[diagram][edition] Unable to select and move a section of a diagram

[lmcbout]

In the diagram view, there is no edition, we cannot move the content to another location within the diagram, it moves the complete diagram.

[JanKoehnlein]

Why would you want to move a specific node? Maybe we should rather adapt the auto-layout? What should happen to the container module?

The diagrams are currently just views and as such not editable (not even in the pure graphical sense). Letting users move nodes around would from our point of view open a pandora's box, because then we're quickly into editing the underlying model graphically. As you cannot do this currently, we rather do a diagram pan on drag instead of moving individual nodes.