Bug 212733 [Markers] Problem view no longer updates when changing the visible marker limit
Version: 3.4.0 Build id: I20071211-0010 By default, the view shows 100 markers. When changing this limit (through marker prefs), the view doesn't update. One need to close/reopen for this to get taken into account. This is a regression.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/provisional/views/markers/ExtendedMarkersView.java
* Add the category to the list of expanded categories.
	 * 
	 * @param category
	 */
	void addExpandedCategory(MarkerCategory category) {
		categoriesToExpand.add(category.getName());
	}
	/**
	 * Add all of the markers in markerItem recursively.
	 * 
	 * @param markerItem
	 * @param allMarkers
	 *            {@link Collection} of {@link IMarker}
	 */
	private void addMarkers(MarkerItem markerItem, Collection allMarkers) {
		if (markerItem.getMarker() != null)
			allMarkers.add(markerItem.getMarker());
		MarkerItem[] children = markerItem.getChildren();
		for (int i = 0; i < children.length; i++) {
			addMarkers(children[i], allMarkers);
		}
	}
	/**
	 * Create the columns for the receiver.
	 * 
	 * @param currentColumns
	 *            the columns to refresh
	 */
	private void createColumns(TreeColumn[] currentColumns) {
		Tree tree = viewer.getTree();