Bug 215244 [Markers] Show All menu entry is not persisted
If you select Show All it will not be restored on return. Not an issue in the dialog.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/views/markers/CachedMarkerBuilder.java
*/
	Collection getEnabledFilters() {
		if (enabledFilters == null) {
			enabledFilters = new HashSet();
			Iterator filtersIterator = getAllFilters().iterator();
			while (filtersIterator.hasNext()) {
				MarkerFieldFilterGroup next = (MarkerFieldFilterGroup) filtersIterator
						.next();
				if (next.isEnabled())
					enabledFilters.add(next);
			}
		}
		return enabledFilters;
	}
	/**
	 * Return the generator for the receiver.
	 * 
	 * @return MarkerContentGenerator
	 */
	MarkerContentGenerator getGenerator() {
		return generator;
	}
	/**
	 * Get the name of the filters preference for the receiver,
	 * 
	 * @return String
	 */
	private String getLegacyFiltersPreferenceName() {
		if (viewId.equals(IPageLayout.ID_BOOKMARKS))
			return IDEInternalPreferences.BOOKMARKS_FILTERS;