Bug 127289 [Markers] SystemFilter and group selection state not preserved
We are not preserving the selection state of the system filters or which group is selected.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/views/markers/internal/ProblemView.java
*/
	String getFiltersPreferenceName() {
		return IDEInternalPreferences.PROBLEMS_FILTERS;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.views.markers.internal.MarkerView#getAllFilters()
	 */
	MarkerFilter[] getAllFilters() {
		MarkerFilter[] userFilters = super.getAllFilters();
		Collection declaredFilters = MarkerSupportRegistry.getInstance()
				.getRegisteredFilters();
		Iterator iterator = declaredFilters.iterator();
		MarkerFilter[] allFilters = new MarkerFilter[userFilters.length
				+ declaredFilters.size()];
		System.arraycopy(userFilters, 0, allFilters, 0, userFilters.length);
		int index = userFilters.length;
		while (iterator.hasNext()) {
			allFilters[index] = (MarkerFilter) iterator.next();
			index++;
		}
		return allFilters;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.views.markers.internal.MarkerView#addDropDownContributions(org.eclipse.jface.action.IMenuManager)
	 */
	void addDropDownContributions(IMenuManager menu) {