SVN commit 514315 by dfaure:

Preserve modification time when copying to other protocols too.
Currently implemented for file:/ -> system:/ and probably vice versa,
need to look at the other protocols.

CCBUG: 79937


 M  +9 -0      kio/forwardingslavebase.cpp  
 M  +17 -2     kio/job.cpp  
 M  +9 -0      kio/jobclasses.h  
 M  +18 -5     kio/slavebase.h  
 M  +102 -14   tests/jobtest.cpp  
 M  +7 -1      tests/jobtest.h