Bug 213486 [Markers] view descriptions wrong when grouped
I20071218-0800. When grouped the view says 'Filter matches 100 of xyz items' but below you see that there are many more items shown as the marker filter is applied per group.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/provisional/views/markers/ExtendedMarkersView.java
* Set the selection of the receiver. reveal the item if reveal is true.
	 * 
	 * @param structuredSelection
	 * @param reveal
	 */
	void setSelection(StructuredSelection structuredSelection, boolean reveal) {
		List newSelection = new ArrayList(structuredSelection.size());
		for (Iterator i = structuredSelection.iterator(); i.hasNext();) {
			Object next = i.next();
			if (next instanceof IMarker) {
				MarkerItem marker = builder.getMarkerItem((IMarker) next);
				if (marker != null) {
					newSelection.add(marker);
				}
			}
		}
		viewer.setSelection(new StructuredSelection(newSelection), reveal);
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.part.ViewPart#setInitializationData(org.eclipse.core.runtime.IConfigurationElement,
	 *      java.lang.String, java.lang.Object)
	 */
	public void setInitializationData(IConfigurationElement cfig,
			String propertyName, Object data) {
		super.setInitializationData(cfig, propertyName, data);
		if (propertyName.equals(MarkerSupportInternalUtilities.ATTRIBUTE_CLASS)
				&& data != null) {
			StringTokenizer tokens = new StringTokenizer((String) data, ";");