Bug 108017 [Markers] Disabling a marker type disables the whole filter
20050825 When you disable a marker type it disables the whole dialog.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/views/markers/internal/DialogMarkerFilter.java
layout.marginWidth = radio.computeSize(SWT.DEFAULT, SWT.DEFAULT).x;
            layout.marginHeight = 0;
            radio.dispose();
            composite.setLayout(layout);
            selectButton = createButton(composite, SELECT_WORKING_SET_ID,
                    MarkerMessages.filtersDialog_workingSetSelect, false);
        }
        /**
         * Returns wether or not a working set filter should be used
         * 
         * @return 
         * 	true=a working set filter should be used
         * 	false=a working set filter should not be used
         */
        boolean getSelection() {
            return button.getSelection();
        }
        /**
         * Returns the selected working set filter or null if none 
         * is selected.
         * 
         * @return the selected working set filter or null if none 
         * 	is selected.
         */
        IWorkingSet getWorkingSet() {
            return (IWorkingSet) button.getData();
        }
        /**
         * Sets the working set filter selection.
         *