Show a warning on state machine execution

[franzlst]

Show a warning if a library state was changed and another state machine, which includes the library, is started without reloading.

Originally created by @sebastian-brunner (Sebastian.Brunner@dlr.de) at 2017-05-09 12:03:33+00:00 (moved from RMC internal repository)

[JohannesErnst]

I think this is a very good idea and need feature