title: selection in CheckboxTableViewer on win7 is not working
body: <p>i try to use an org.eclipse.jface.viewers.CheckboxTableViewer, as a component of a org.eclipse.jface.wizard.WizardPage. I created it this way:</p>
  
  <pre><code>public void createControl(Composite parent) {
      composite = new Composite(parent, SWT.NULL);
      final GridLayout gridLayout = new GridLayout();
      gridLayout.numColumns = 2;
      composite.setLayout(gridLayout);
      setControl(composite);
  
      /* CheckboxTableViewer */
      viewer = CheckboxTableViewer.newCheckList(composite, SWT.BORDER);
      final Table table = viewer.getTable();
      GridData data1 = new GridData();
      data1.grabExcessHorizontalSpace = true;
      data1.grabExcessVerticalSpace = true;
      data1.horizontalSpan = 2;
      data1.horizontalAlignment = SWT.FILL;
      data1.verticalAlignment = SWT.FILL;
      table.setLayoutData(data1);
      table.setHeaderVisible(true);
      table.setLinesVisible(true);
  
      checkboxColumn = new TableColumn(table, SWT.LEFT);
      ...
  </code></pre>
  
  <p>the content of the viewer is inserted dynamically by a contentprovider. Everything works fine on gnome. While testing this on windows 7 (64 and 32 bit also), i am not able to select any entries of that view. Mouseclicks just seems to have no impact on the view.
  I added a mouselistener to the table, and the mouseUp-/Down event is fired, selectionChanged and doubleClick on the viewer is not fired. Anyone who can explain this behaviour to me?</p>
  
  <p>thx in advance,</p>
  
  <p>hage </p>
  
  <p>(i already posted this question in the eclipse forum without any response yet: <a href="http://www.eclipse.org/forums/index.php/t/250953/" rel="nofollow">http://www.eclipse.org/forums/index.php/t/250953/</a> )</p>