Introduce background tasks to increase EA usability

[Jes]

When transforming an LDM to PDM then the whole UI blocks... and Windows intreprets this as a crash and asks if I would like to kill the program - which I learned to ignore. Hands-down, this is a true annoyance, especially when transforming a larger LDM.
Also, during the transformation then the cancel button is of very limited use since the UI thread seams to be the one performing the transform.
Thank you,
Jes

[skiwi]

+1