Add new method to get and set customers form tag attributtes

Change-Id: If060ee85239d7ea39d9acce87f591a22c8d7eef0
Add further decorator storage key

Change-Id: I369722fdcb5786d5ca2f3e2d72f6136fe63ada2a
Implement a form cancel button, if a abortation link available

Change-Id: I63e9297d20d808c10a5fe88ef79e0bf30d39f6ba
Update description

Change-Id: I919dc9b0c652b53b4be21d924a7ba5c9874c8a0f
Add functions and methods to handle foreign target entity during insert,
update process

Change-Id: If344439332ca4bfb56d3418dddeb52ce780f48ee