Saving file during the simulation

[Paula Bettio Staudt]

When you save a file which is a "using file" of a simulation that is already running, EMSO stops the simulation but no message is given. And after that, EMSO doesn't work very well, it's necessary restart the application.

[Rafael de Pelegrini Soares]

Problem fixed on the development version (0.9.52).

Now the entire dependency tree of a file is checked before saving changes.