fixed typo on soft keyboard deactivate event (closes #631)
TextInput: metadata for soft keyboard events that bubble from text editor (references #631)
VerticalCenteredPopUpContentManager: touch must begin and end outside of the content to close it (closes #632)
Button: updating isEnabled on label text renderer and icon if IFeathersControl
Item renderers: updating isEnabled on accessory if IFeathersControl (closes #630)