Bug 228760 [Markers] Column orientation not stored when markers views are closed
If we re-order view columns by drag and drop or add/remove them using the preferences the values we ended up with are not restored on restart.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/views/markers/CachedMarkerBuilder.java
return;
		if (isShowingHierarchy()) {
			MarkerCategory[] newCategories = buildHierarchy(newMarkers, 0,
					newMarkers.getSize() - 1, 0);
			if (monitor.isCanceled())
				return;
			categories = newCategories;
		}
		monitor.worked(50);
		currentMap = newMarkers;
	}
	/**
	 * Add group to the enabled filters.
	 * 
	 * @param group
	 */
	void toggleFilter(MarkerFieldFilterGroup group) {
		Collection enabled = getEnabledFilters();
		if (enabled.remove(group)) 
			group.setEnabled(false);
		else {
			group.setEnabled(true);
			enabled.add(group);
		}
		writeFiltersPreference();
		scheduleMarkerUpdate();
	}
	/**
	 * Update the focus resources from list. If there is an update required
	 * return <code>true</code>. This method assumes that there are filters