Bug 33216 Source actions in context menu on types inconsistency
1) select a type in the package explorer 2) bring up the context menu ->the source actions are shown in-line and the menu is huge. Given that we show a source submenu in other parts (e.g. the editor) and do the same for the refactoring actions we should also move the source actions into a submenu.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/ui/actions/GenerateActionGroup.java
private AddBookmarkAction fAddBookmark;
	private AddTaskAction fAddTaskAction;
	private ExternalizeStringsAction fExternalizeStrings;
	private FindStringsToExternalizeAction fFindStringsToExternalize;
	private SurroundWithTryCatchAction fSurroundWithTryCatch;
	private AddToClasspathAction fAddToClasspathAction;
	private RemoveFromClasspathAction fRemoveFromClasspathAction;
	
	private OrganizeImportsAction fOrganizeImports;
	private SortMembersAction fSortMembers;
	private ConvertLineDelimitersAction fConvertToWindows;
	private ConvertLineDelimitersAction fConvertToUNIX;
	private ConvertLineDelimitersAction fConvertToMac;
	/**
	 * Note: This constructor is for internal use only. Clients should not call this constructor.
	 */
	public GenerateActionGroup(CompilationUnitEditor editor, String groupName) {
		fSite= editor.getSite();
		fEditor= editor;
		fGroupName= groupName;
				
		ISelectionProvider provider= fSite.getSelectionProvider();
		ISelection selection= provider.getSelection();
	
		fAddImport= new AddImportOnSelectionAction(editor);
		fAddImport.setActionDefinitionId(IJavaEditorActionDefinitionIds.ADD_IMPORT);
		fAddImport.update();
		editor.setAction("AddImport", fAddImport); 
		
		fOrganizeImports= new OrganizeImportsAction(editor);