JBIDE-16865 maint

Servertools (for some unknown reason) only instantiates each wizard fragment (basically, wizard page) once. This makes it difficult to keep state here, or know exactly when to reset state.  After a user has already made an AS7.1 server, for example,  the next time they attempt to make one, the existing fragment is re-used. All of the widgets are currently disposed. But, the page is expected to know whether or not the page is complete BEFORE the user enters the page. and thus, before the composite (and new widgets) have been created. 

Pain in the butt, for sure. Easy workaround though.