Allow iLogic Forms in forms for assets

[lune.riezebos]

For our more eleborate assets we utilize iLogic forms for our assets.

With non-assets we can call forms from our main forms, sadly as soon as we 
publish our assembly as an asset, the secondary forms do not work anymore.

This feels like a big missed chance.

[martin.andersenRSHNW]

For our ide to work proper, a form in a form is needed.