Improve handling when disconnecting device

GUI/SEA14TestGUI/src/ch/ntb/inf/sea14/test/BoardTester.java

@@ -45,7 +45,7 @@ public class BoardTester implements Runnable {
 				// TODO Auto-generated catch block
 				e.printStackTrace();
 			}
-			if (isConnected) notifyViews();		
+			notifyViews();		
 		}
 	}
 

GUI/SEA14TestGUI/src/ch/ntb/inf/sea14/test/Comm/Connection.java

@@ -78,8 +78,10 @@ public class Connection {
 //						else if (b == '\r') System.out.print("CR");
 //						else System.out.print((char)b);
 					}
-				} catch (IOException e) {
-					e.printStackTrace();
+				} catch (Exception e) {
+					model.isConnected = false;
+					close();
+					return null;
 				}
 			}
 		}