Fixes issue 3516: SwingRestartDialog packs down to an unusable size

Change-Id: I687f8d77f54a84dc220fc01099494957ae5979cf
Reviewed-on: http://gerrit.dmdirc.com/501
Automatic-Compile: Shane Mc Cormack <shane@dmdirc.com>
Reviewed-by: Shane Mc Cormack <shane@dmdirc.com>

src/com/dmdirc/addons/ui_swing/dialogs/updater/SwingRestartDialog.java

@@ -106,13 +106,21 @@ public class SwingRestartDialog extends StandardDialog implements ActionListener
     
     /** Layout Components. */
     public void layoutComponents() {
-        setLayout(new MigLayout("fill, wrap 2"));
+        setLayout(new MigLayout("fill, wrap 2, wmax " +
+                mainFrame.getSize().getWidth() + ", pack"));
         
-        add(info, "grow, pushy, span 2");
+        add(info, "grow, pushx, span 2");
         add(getLeftButton(), "split, right");
         add(getRightButton(), "right");
     }
 
+    /** {@inheritDoc} */
+    @Override
+    public void validate() {
+        super.validate();
+        setLocationRelativeTo(mainFrame);
+    }
+
     /** 
      * {@inheritDoc}
      *