Bug 120691 [Markers] Expanded categories not persisted between sessions
build I20051213 - in the Problems view in hierarchical mode, with many problems showing, - expand a few categories, select some leaf problems - shutdown / restart - the tree is collapsed Users will expect that the work they did to expand/collapse categories to see the problems they care most about will be persisted between sessions.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/views/markers/ExtendedMarkersView.java
}
	/**
	 * Toggle the sort direction of the primary field
	 */
	void toggleSortDirection() {
		setPrimarySortField(builder.getPrimarySortField());
	}
	/**
	 * Update the direction indicator as column is now the primary column.
	 * 
	 * @param column
	 * @field {@link MarkerField}
	 */
	void updateDirectionIndicator(TreeColumn column, MarkerField field) {
		viewer.getTree().setSortColumn(column);
		if (builder.getSortDirection(field) == MarkerComparator.ASCENDING)
			viewer.getTree().setSortDirection(SWT.UP);
		else
			viewer.getTree().setSortDirection(SWT.DOWN);
	}
	/**
	 * Update the title of the view.
	 */
	void updateTitle() {
		String status = MarkerSupportConstants.EMPTY_STRING;
		int totalCount = builder.getTotalMarkerCount();
		int filteredCount = 0;
		MarkerCategory[] categories = builder.getCategories();
		
		if (categories != null && builder.isShowingHierarchy()) {