Implement object identifiers as PAYG

For PAYG reasons, identifiers are not added to every object "just-in-case".
But there're scenarios, where we want to have such identifiers.

The idea is:
>for any component that implements IStrand (like UIBase), we could define a bead that goes on the strand that would generate an identifier. [1]

[1] http://apache-royale-development.20373.n8.nabble.com/How-to-identify-object-instances-StableObjectId-tp8684p8703.html