OnlineGlom: Make clientFactory a (protected) member, and test it a bit.

OnlineGlom: Make clientFactory a (protected) member, and test it a bit.

* src/main/java/org/glom/web/client/OnlineGlom.java: Make clientFactory
a class member instead of a local variable in the method.
This lets us use it to get the view instances, for use in tests.
* src/test/java/org/glom/web/client/GwtTestOnlineGlom.java:
beforeOnlineGlom(): Test some more details of the initial view.
Again, this is not very useful.

To really test gwt-glom we will need to start a local postgresql
instance with local data, like the Glom tests in C++.