question 2 of x - help to update the docs for 1.6.0

[Uwe Stöhr]

The document settings dialog provides under Bibliography a new option "Sectioned bibliography". I 
don't understand how this option works, I mean how and what is sectioned?
The option loads the bibtopic package but its documentation tells me that I have to use some 
additional ERT commands to set up the sectionings.

regards Uwe