Sorting tables by first column causes AWT errors

If you sort by clicking on the title bar for the first column on some of the tables, an annoying panel appears with a stack trace on it.

Solved by applying the attached patch to revision 24 in the svn repo.

Exception in thread "AWT-EventQueue-0" java.lang.ClassCastException: net.sf.hibernate.jconsole.ui.widgets.TableCellJLabel cannot be cast to java.lang.String
at java.text.Collator.compare(Collator.java:310)
at javax.swing.DefaultRowSorter.compare(DefaultRowSorter.java:951)
at javax.swing.DefaultRowSorter.access$100(DefaultRowSorter.java:95)
at javax.swing.DefaultRowSorter$Row.compareTo(DefaultRowSorter.java:1359)
at javax.swing.DefaultRowSorter$Row.compareTo(DefaultRowSorter.java:1349)
at java.util.Arrays.mergeSort(Arrays.java:1144)
at java.util.Arrays.mergeSort(Arrays.java:1155)
at java.util.Arrays.mergeSort(Arrays.java:1155)
at java.util.Arrays.mergeSort(Arrays.java:1155)
at java.util.Arrays.mergeSort(Arrays.java:1155)
at java.util.Arrays.sort(Arrays.java:1079)
at javax.swing.DefaultRowSorter.sort(DefaultRowSorter.java:590)
at javax.swing.DefaultRowSorter.setSortKeys(DefaultRowSorter.java:302)
at javax.swing.DefaultRowSorter.toggleSortOrder(DefaultRowSorter.java:463)
at javax.swing.plaf.basic.BasicTableHeaderUI$MouseInputHandler.mouseClicked(BasicTableHeaderUI.java:93)
at java.awt.AWTEventMulticaster.mouseClicked(AWTEventMulticaster.java:253)
at java.awt.Component.processMouseEvent(Component.java:6266)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3267)
at java.awt.Component.processEvent(Component.java:6028)
at java.awt.Container.processEvent(Container.java:2041)
at java.awt.Component.dispatchEventImpl(Component.java:4630)
at java.awt.Container.dispatchEventImpl(Container.java:2099)
at java.awt.Component.dispatchEvent(Component.java:4460)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4574)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4247)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4168)
at java.awt.Container.dispatchEventImpl(Container.java:2085)
at java.awt.Window.dispatchEventImpl(Window.java:2475)
at java.awt.Component.dispatchEvent(Component.java:4460)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)