Custom DisplayInteractor for the MIDAS tools
Create a customised display interactor for the MIDAS DnD editor and tools, based on mitk::DisplayInteractor.
The reasons for this:
After the redesign of the interaction framework of MITK, the display interactors were not disabled after activating a tool. This caused #2153 (closed) and #2160 (closed). This could be solved if we dumped the mitk::DisplayInteractor as it is, and replaced it with our variant.
#2237 (closed) requires a change in the display interactor. This can be done either in our MITK fork, or by duplicating the display interactor in our code and customising it.
There was a request to disable only certain parts of the display interaction while some tools are switched on. (Those mouse buttons that do not conflict.) This would be possible with the current enhancement.