remove ParentEntity and RootParentEntity
Parent and RootParent are now IEntity properties
refactor object arguments to IEntity for parent related methods
branch and version bump to 2.6
move stuckmenu methods from core mobile to PlayerMobile
take advantage of IEntity/Parent refactor in a few trivial places
set Parent CommandProperty write accesslevel to Developer
unmark Parent property as virtual
change serverlist public ip address autodetection url
fixed base OnSubItemAdded being hidden in playermobile
Merge branch 'dev/2.6'