Bug 339347 [Markers] Can't toggle item limits in Problems view any more without losing limit
I20110308-2000 I can't toggle item limits in Problems view any more without losing limits. After I've disabled the limits, the next time I enable limits, the value is "1". The stored value should not be changed.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/views/markers/MarkerContentGenerator.java
*/
	private void loadUserFilter(IMemento child) {
		MarkerFieldFilterGroup newGroup = new MarkerFieldFilterGroup(null, this);
		newGroup.loadSettings(child);
		getAllFilters().add(newGroup);
	}
	/**
	 * Restore the pre-3.4 filters.
	 * 
	 * @param memento
	 */
	private void restoreLegacyFilters(IMemento memento) {
		IMemento[] sections = null;
		if (memento != null)
			sections = memento.getChildren(TAG_LEGACY_FILTER_ENTRY);
		for (int i = 0; i < sections.length; i++) {
			IMemento child = sections[i];
			String id = child.getString(IMemento.TAG_ID);
			if (id == null)
				continue;
			loadLegacyFilter(child);
		}
	}
	/**
	 * 
	 */
	private void writeFiltersPreference() {
		XMLMemento memento = XMLMemento.createWriteRoot(TAG_FILTERS_SECTION);
		writeFiltersSettings(memento);
		StringWriter writer = new StringWriter();