[Seaside] Seaside 2.8 522 buglet when adding applications

[Ragnar Hojland Espinosa]

In the process of getting out of the squeak/seaside stone age I found
that, when adding an application to 2.8 but not specifying an root
component, rootComponent is nil and broke /seaside/config due to:

WAApplication>>description
	^ self rootComponent description

which I quick fixed as:

WAApplication>>description
	self rootComponent notNil
		ifTrue: [^ self rootComponent description]
		ifFalse: [^ '' ]

-- 
Ragnar