Can't fix your problem. I'm looking for a similar solution myself.

• But one work to do this is to put them in a group, 
• double click on the object to enter the group,
• `control a` to select all the objects in the group.
• `F2` to enter paths editing
• select all of the nodes u want to move
• move them

I hope this helps a bit. 

-- from a fellow inkscape artist