Improvements on interactive simulation

src/remotesimulation/CommandParser.java

src/ui/IconManager.java

...i/interactivesimulation/InteractiveSimulationActions.java

...ui/interactivesimulation/JFrameInteractiveSimulation.java

src/ui/interactivesimulation/MainCommandsToolBar.java

src/ui/interactivesimulation/SaveCommandsToolBar.java

src/ui/interactivesimulation/StateCommandsToolBar.java