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
*/
    public void setFilter(MarkerFilter newFilter) {
        filters = new MarkerFilter[] {newFilter};
        updateUIFromFilter();
    }
    /**
     * @return the MarkerFilter associated with the dialog.
     */
    public MarkerFilter[] getFilters() {
        return filters;
    }
    /**
     * @return <code>true</code> if the filter's enablement button is checked 
     * otherwise <code>false</code>.
     */
    protected boolean isFilterButtonEnabled() {
        return (filterEnabledButton == null)
                || filterEnabledButton.getSelection();
    }
    /**
     * A selection has occured on one of the checkboxes or combos.
     * Update.
     *
     */
	protected void updateForSelection() {
		updateEnabledState(true);
		markDirty();
	}
}