Bug 11109 F1 no longer works in Packages view
new context ID?
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/packageview/PackageExplorerPart.java
initLibraryFilterFromPreferences();		
		
		
		String showbin= fMemento.getString(TAG_SHOWBINARIES);
		if (showbin != null)
			getBinaryFilter().setShowBinaries(showbin.equals("true")); 
		else 
			initBinaryFilterFromPreferences();		
			
		
		String workingSetName= fMemento.getString(TAG_WORKINGSET);
		if (workingSetName != null) {
			IWorkingSet ws= SearchUI.findWorkingSet(workingSetName);
			if (ws != null) {
				getWorkingSetFilter().setWorkingSet(ws);
			}
		}
		fMemberFilterActionGroup.restoreState(fMemento);
	}
	
	void initFilterFromPreferences() {
		initBinaryFilterFromPreferences();
		initLibraryFilterFromPreferences();
	}
	void initLibraryFilterFromPreferences() {
		JavaPlugin plugin= JavaPlugin.getDefault();
		boolean show= plugin.getPreferenceStore().getBoolean(TAG_SHOWLIBRARIES);
		getLibraryFilter().setShowLibraries(show);
	}
	void initBinaryFilterFromPreferences() {