Re-use enter-key inspection from base class.
Add RevealableView as base class.

+ Extract reveal code from LoginView.
+ Rename `hideForm` method to `closeView`.
Use BaseItemView as superclass in DeleteEntryView.
Remove redundant code in ParticipateView.

+ Already defined in superclass.
Remove redundant code in DetailsView.

+ Already defined in superclass.
Remove redundant code in EntryView.

+ Already defined in superclass.