[Lazarus] Name mismatches in TControl OnEnabledChange

[Hans-Peter Diettrich]

While other handlers have symmetric Add/Remove methods, this is 
different for an OnEnabledChanged <--> OnEnableChanging handler:

procedure AddHandlerOnEnabledChanged(const OnEnabledChangedEvent: 
TNotifyEvent; AsFirst: boolean = false);
procedure RemoveHandlerOnEnableChanging(const OnEnableChangingEvent: 
TNotifyEvent);

What's the correct name of the event:
   OnEnabledChanged - matches chtOnEnabledChanged
or
   OnEnableChanging - looks incorrect
???

DoDi