Fixed login error message hierarcy

Author: OAarne

tmc-plugin/src/fi/helsinki/cs/tmc/ui/LoginDialog.java

@@ -35,7 +35,7 @@ public void windowClosed(WindowEvent e) {
      * Creates new form LoginForm
      */
     public LoginDialog(ActionListener onLogin) {
-        super(WindowManager.getDefault().getMainWindow(), true);
+        super(WindowManager.getDefault().getMainWindow(), false);
         initComponents();
 
         this.setDefaultCloseOperation(DISPOSE_ON_CLOSE);

tmc-plugin/src/fi/helsinki/cs/tmc/utilities/LoginManager.java

@@ -52,7 +52,7 @@ public void actionPerformed(ActionEvent e) {
                             log.log(Level.WARNING, "Authentication failed!", ex);
                             if (ex instanceof AuthenticationFailedException) {
                                 authenticationException = (AuthenticationFailedException) ex;
-//                                ConvenientDialogDisplayer.getDefault().displayError("Username or password is incorrect.", ex);
+                                ConvenientDialogDisplayer.getDefault().displayError("Username or password is incorrect.", ex);
                             }
                         }
                         setReady(true);