GUI supports ViewTypes (Full, Short, Edit).
GUI : A View is always from ViewTypes. cleaned.
Add / Update an Item. gui-bug-visible fixed. cleaning.
Fallback constructor bug fixed (when object was null). Added JPanel constructor that takes a LayoutManager. cleaning.
cleaning.
Added biler.getRandom() to get random Model from random Index. Better Product View. About button opens About (instead of Splash then About).