Page History

...

For redo/undo we will enable/disable based on the undo history size.

Logic charts for current behaviour

Contacts App	S folderActions	G addActions	G editActions	S contactsActions	G addActions	G editActions
no selection or root	x	x		x	x
mgnl:folder	x	x	x	x	x
any other node				x		x

Configuration App	G addingActions	G duplicateActions	G activationActions	G importExportActions	A addFolder	A delete
no selection or root					x
mgnl:contentNode	x	x	x	x	x
mgnl:content	x	x	x	x
property						x

Security Groups/Roles	addActions	editActions
no selection or root	x
any node		x

Security Users	addActions	editActions
/admin or /system	x
any node		x

Assets	S folderActions	S assetsActions	A createVariant
no selection or root		x
mgnl:folder	x
any other node		x	only if node is master

The action bar can take several states within one sub-app.

...