[SPOT FIX] LPS-32987

Hi Tamás,

This pull request contains the commits I formerly provided for LPS-32983, please ignore them.

The cause of the issue was that method storeFieldFile(...) in DDMImpl was not able to update previously uploaded files when the record version remained the same (when saved as draft).

I'd like to create a spot fix, thus it's enough if  the component lead says that my changes won't break anything.
 
Thanks,
Laci.