Parts editor needs to be able to save a new VERSION of a file (not a whole new part)

With the need to change schematic images this has become more of a problem.

Open part with bad schematic image, load new image for schematic, assign pins 
etc, and select to Save. 

You are prompted for a prefix and the part is saved in a new file, as a 
different variant ("variant 2"), so now you have both the crusty old part and 
the new hotness part both in your bins, effectively different parts.

This is not desirable in any way I can think of.  

There needs to be a way in the parts editor to
  1. change the version string (<version>X</version>)
  2. force it to save the part without creating a whole new part file, that is, force the parts editor to write to a specific file (the same fzp you opened, or any other file location you want to write it to).

Original issue reported on code.google.com by bitsybof...@gmail.com on 31 Jan 2014 at 4:52

buixuanan / fritzing

Parts editor needs to be able to save a new VERSION of a file (not a whole new part) #2909