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/ExtendedMarkersView.java
boolean isShowing(MarkerContentGenerator generator) {
		return this.builder.getGenerator().equals(generator);
	}
	/**
	 * Log that a generator id is invalid.
	 * 
	 * @param id
	 */
	void logInvalidGenerator(String id) {
		StatusManager.getManager().handle(
				new Status(IStatus.WARNING, IDEWorkbenchPlugin.IDE_WORKBENCH,
						NLS.bind("Invalid markerContentGenerator {0} ", 
								id)));
	}
	/**
	 * Open the filters dialog for the receiver.
	 */
	void openFiltersDialog() {
		FiltersConfigurationDialog dialog = new FiltersConfigurationDialog(
				new SameShellProvider(getSite().getWorkbenchWindow().getShell()),
				builder);
		if (dialog.open() == Window.OK) {
			builder.updateFrom(dialog);
		}
	}
	/**
	 * Open the selected markers
	 */
	void openSelectedMarkers() {
		IMarker[] markers = getSelectedMarkers();