Bug 67814 Show In > Package Explorer doesn't ask for removal of last filter [package explorer]
200406180010; Not a dup of 66646. 'Show In > Package Explorer' doesn't ask for removal of a filter iff there's only a single filter set. Steps: - Disable all filters in Package Explorer, except for 'Referenced Libraries'. - Open editor for java.util.Vector - Navigate > Show In > Package Explorer => fails, doesn't ask for filter removal. Works iff at least one other filter (which would not filter the element) is active.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/ui/actions/CustomFiltersActionGroup.java
* @since 3.0
	 */
	private Stack fLRUFilterIdsStack; 
	/**
	 * Handle to menu manager to dynamically update
	 * the last recently used filters.
	 * 
	 * @since 3.0
	 */
	private IMenuManager fMenuManager;
	/**
	 * The menu listener which dynamically updates
	 * the last recently used filters.
	 * 
	 * @since 3.0
	 */
	private IMenuListener fMenuListener;
	/**
	 * Filter Ids used in the last view menu invocation.
	 * 
	 * @since 3.0
	 */
	private String[] fFilterIdsUsedInLastViewMenu;
	private HashMap fFilterDescriptorMap;
	private String fTargetId;
	
	/**
	 * Creates a new <code>CustomFiltersActionGroup</code>.
	 * 
	 * @param part		the view part that owns this action group