When I edit a sketch of a part and I go to the assembly without exiting the sketch I get a warning that the part is in rollback and the part is not visible in the assembly. 

I would prefer that it would rebuild the part with the edits as they are, and if that is not possible then I just show it as it was before I went into the sketch.  Sometimes I just need to check a measurement to update my sketch, but I have to exit editing the sketch, and then go back to the assembly get the measurement and then go reopen the sketch.