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/javaeditor/JavaOutlinePage.java
static Object[] NO_CHILDREN= new Object[0];
   
			/**
			 * The element change listener of the java outline viewer.
			 * @see IElementChangedListener
			 */
			class ElementChangedListener implements IElementChangedListener {