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
fEncodingSupport= new DefaultEncodingSupport();
		fEncodingSupport.initialize(this);
		
		fSelectionHistory= new SelectionHistory(this);
		action= new StructureSelectEnclosingAction(this, fSelectionHistory);
		action.setActionDefinitionId(IJavaEditorActionDefinitionIds.SELECT_ENCLOSING);				
		setAction(StructureSelectionAction.ENCLOSING, action);
		action= new StructureSelectNextAction(this, fSelectionHistory);
		action.setActionDefinitionId(IJavaEditorActionDefinitionIds.SELECT_NEXT);
		setAction(StructureSelectionAction.NEXT, action);
		action= new StructureSelectPreviousAction(this, fSelectionHistory);
		action.setActionDefinitionId(IJavaEditorActionDefinitionIds.SELECT_PREVIOUS);
		setAction(StructureSelectionAction.PREVIOUS, action);
		StructureSelectHistoryAction historyAction= new StructureSelectHistoryAction(this, fSelectionHistory);
		historyAction.setActionDefinitionId(IJavaEditorActionDefinitionIds.SELECT_LAST);		
		setAction(StructureSelectionAction.HISTORY, historyAction);
		fSelectionHistory.setHistoryAction(historyAction);
				
		action= GoToNextPreviousMemberAction.newGoToNextMemberAction(this);
		action.setActionDefinitionId(IJavaEditorActionDefinitionIds.GOTO_NEXT_MEMBER);				
		setAction(GoToNextPreviousMemberAction.NEXT_MEMBER, action);
		action= GoToNextPreviousMemberAction.newGoToPreviousMemberAction(this);
		action.setActionDefinitionId(IJavaEditorActionDefinitionIds.GOTO_PREVIOUS_MEMBER);				
		setAction(GoToNextPreviousMemberAction.PREVIOUS_MEMBER, action);
		
		action= new QuickFormatAction();
		action.setActionDefinitionId(IJavaEditorActionDefinitionIds.QUICK_FORMAT);
		setAction(IJavaEditorActionDefinitionIds.QUICK_FORMAT, action);
		action= new RemoveOccurrenceAnnotations(this);