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
try {
				
				if (isCancelled())
					return Status.CANCEL_STATUS;
				
				ITextViewer textViewer= getViewer(); 
				if (textViewer == null)
					return Status.CANCEL_STATUS;
				
				IDocument document= textViewer.getDocument();
				if (document == null)
					return Status.CANCEL_STATUS;
				
				IDocumentProvider documentProvider= getDocumentProvider();
				if (documentProvider == null)
					return Status.CANCEL_STATUS;
			
				IAnnotationModel annotationModel= documentProvider.getAnnotationModel(getEditorInput());
				if (annotationModel == null)
					return Status.CANCEL_STATUS;
				
				
				int length= fPositions.length;
				Map annotationMap= new HashMap(length);
				for (int i= 0; i < length; i++) {
					
					if (isCancelled())
						return Status.CANCEL_STATUS; 
					
					String message;