A few bug fixes

proto/ProtoIn.java

@@ -99,11 +99,7 @@ public class ProtoIn
                         Thread t = new Thread(() -> handler.handleUnknownCommand(length, id, username));
                         t.start();
                 }
-            } catch (EOFException e)
-            {
-                this.loop = false;
-                handler.handleClose();
-            } catch (SocketException e)
+            } catch (EOFException | SocketException e)
             {
                 this.loop = false;
                 handler.handleClose();

window/LoginWindow.java

@@ -59,6 +59,7 @@ public class LoginWindow extends Application {
                     ChatWindow chatWindow = new ChatWindow(servernameAndPort[0], usernameTextField.getText(), socket, this);
                     Stage chatWindowStage = new Stage();
                     chatWindow.start(chatWindowStage);
+                    stage.hide();
                 }
             } catch (NumberFormatException nfe) {
                 Alert alert = new Alert(Alert.AlertType.ERROR);
@@ -78,7 +79,6 @@ public class LoginWindow extends Application {
             } catch (IOException e) {
                 e.printStackTrace();
             }
-            stage.hide();
         });
 
         root.getChildren().addAll(servernameLabel, servernameTextField, usernameLabel, usernameTextField, connectButton);