null reference in web

http://www.expandframework.com/forum/6-bugs/4138-null-reference-in-14-1-6-5-web.html#7318
Unable to cast object of type 'DevExpress.ExpressApp.ConditionalAppearance.AppearanceAttribute' to type 'Xpand.ExpressApp.SystemModule.IXpandAppearanceRuleProperties'.

http://www.expandframework.com/forum/6-bugs/3856-invalidoperationexception-cannot-cast-appearanceattribute-to-ixpandappearanceruleproperties.html?start=12#7356
Remove Model Tab from DetailViews
minor updates
14.1.6.8
[Win and Web EasyTests for Model modification at runtime]