Create things in onload not load

Change-Id: I693acc716a54405f0aeb2cc8bb7739c29e82fca1
Reviewed-on: http://gerrit.dmdirc.com/3110
Automatic-Compile: DMDirc Build Manager
Reviewed-by: Chris Smith <chris@dmdirc.com>

src/com/dmdirc/addons/windowstatus/WindowStatusManager.java

     private final MainFrame mainFrame;
     /** Status bar we're adding to. */
     private final SwingStatusBar statusBar;
-    /** The panel we use in the status bar. */
-    private final WindowStatusPanel panel;
     /** Identity controller to read settings from. */
     private final IdentityController identityController;
     /** Plugin settings domain. */
     private final String domain;
+    /** The panel we use in the status bar. */
+    private WindowStatusPanel panel;
     /** Should we show the real name in queries? */
     private boolean showname;
     /** Should we show users without modes? */
         this.mainFrame = mainFrame;
         this.statusBar = statusBar;
         this.identityController = identityController;
+    }
 
+    /**
+     * Loads the plugin.
+     */
+    public void onLoad() {
         panel = UIUtilities.invokeAndWait(new Callable<WindowStatusPanel>() {
 
             /** {@inheritDoc} */
                 return new WindowStatusPanel();
             }
         });
-    }
-
-    /**
-     * Loads the plugin.
-     */
-    public void onLoad() {
         statusBar.addComponent(panel);
         mainFrame.addSelectionListener(this);
         identityController.getGlobalConfiguration().addChangeListener(domain, this);
     public void onUnload() {
         mainFrame.removeSelectionListener(this);
         statusBar.removeComponent(panel);
+        panel = null;
     }
 
     /** {@inheritDoc} */
         } else {
             textString.append("???");
         }
-        panel.setText(textString.toString());
+        if (panel != null) {
+            panel.setText(textString.toString());
+        }
     }
 
     /**