Possibility to add/remove devices to the pool without initializing/closing them.

src/main/java/ch/psi/mxsc/MainPanel.java

@@ -168,7 +168,7 @@ public class MainPanel extends Panel {
     
     @Override
     public void onStateChange(State state, State former) {
-
+        Controller.getInstance().onStateChange(state, former);
     }