Revise handling and display of simulation properties

[Stefan Ecklebe]

At the moment, there is no way to find out with which settings the currently playing results have been simulated. Furthermore users often hit Simulate without confirming their changes and wonder about the outcome.
Points that could imporve this behavior:

• Provide two property trees, one for the settings of the simulation that is to be run and one for the currently running playback.
• Create a dialog window that has to be closed (confirmed) to change the settings
• use PyQtgraphs PropertyTree to implement better type and range checking of the provided settings
• add method to re-import the current playbacks simulation settings