Bug 52801 "Press F2 for focus" does not work for spell-checking hovers
"Press F2 for focus" does not work for spell-checking hovers.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/JavaEditor.java
oeg= new OpenEditorActionGroup(this),
			sg= new ShowActionGroup(this),
			ovg= new OpenViewActionGroup(this),
			jsg= new JavaSearchActionGroup(this)
		});
		fContextMenuGroup= new CompositeActionGroup(new ActionGroup[] {oeg, ovg, sg, jsg});
		
		ResourceAction resAction= new TextOperationAction(JavaEditorMessages.getResourceBundle(), "ShowJavaDoc.", this, ISourceViewer.INFORMATION, true); 
		resAction= new InformationDispatchAction(JavaEditorMessages.getResourceBundle(), "ShowJavaDoc.", (TextOperationAction) resAction); 
		resAction.setActionDefinitionId(IJavaEditorActionDefinitionIds.SHOW_JAVADOC);
		setAction("ShowJavaDoc", resAction); 
		WorkbenchHelp.setHelp(resAction, IJavaHelpContextIds.SHOW_JAVADOC_ACTION);
		
		Action action= new GotoMatchingBracketAction(this);
		action.setActionDefinitionId(IJavaEditorActionDefinitionIds.GOTO_MATCHING_BRACKET);				
		setAction(GotoMatchingBracketAction.GOTO_MATCHING_BRACKET, action);
			
		action= new TextOperationAction(JavaEditorMessages.getResourceBundle(),"ShowOutline.", this, JavaSourceViewer.SHOW_OUTLINE, true); 
		action.setActionDefinitionId(IJavaEditorActionDefinitionIds.SHOW_OUTLINE);
		setAction(IJavaEditorActionDefinitionIds.SHOW_OUTLINE, action);
		WorkbenchHelp.setHelp(action, IJavaHelpContextIds.SHOW_OUTLINE_ACTION);
		action= new TextOperationAction(JavaEditorMessages.getResourceBundle(),"OpenStructure.", this, JavaSourceViewer.OPEN_STRUCTURE, true); 
		action.setActionDefinitionId(IJavaEditorActionDefinitionIds.OPEN_STRUCTURE);
		setAction(IJavaEditorActionDefinitionIds.OPEN_STRUCTURE, action);
		WorkbenchHelp.setHelp(action, IJavaHelpContextIds.OPEN_STRUCTURE_ACTION);
		
		action= new TextOperationAction(JavaEditorMessages.getResourceBundle(),"OpenHierarchy.", this, JavaSourceViewer.SHOW_HIERARCHY, true); 
		action.setActionDefinitionId(IJavaEditorActionDefinitionIds.OPEN_HIERARCHY);
		setAction(IJavaEditorActionDefinitionIds.OPEN_HIERARCHY, action);
		WorkbenchHelp.setHelp(action, IJavaHelpContextIds.OPEN_HIERARCHY_ACTION);