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/internal/ui/browsing/JavaBrowsingPart.java
private BuildActionGroup fBuildActionGroup;
	private ToggleLinkingAction fToggleLinkingAction;
	protected CompositeActionGroup fActionGroups;
	
	private CustomFiltersActionGroup fCustomFiltersActionGroup;
	
	protected IWorkbenchPart fPreviousSelectionProvider;
	protected Object fPreviousSelectedElement;
		
	
	private boolean fLinkingEnabled;
		
	/*
	 * Ensure selection changed events being processed only if
	 * initiated by user interaction with this part.
	 */
	private boolean fProcessSelectionEvents= true;
	private IPartListener2 fPartListener= new IPartListener2() {
		public void partActivated(IWorkbenchPartReference ref) {
			setSelectionFromEditor(ref);
		}
		public void partBroughtToTop(IWorkbenchPartReference ref) {
			setSelectionFromEditor(ref);
		}
	 	public void partInputChanged(IWorkbenchPartReference ref) {
			setSelectionFromEditor(ref);
	 	}
		public void partClosed(IWorkbenchPartReference ref) {
		}
		public void partDeactivated(IWorkbenchPartReference ref) {