If you try to overwrite a file, the dolphin confirmation dialogue only shows
the source and destination file name. Details (like size, date, ...) on the
files are missing. So it's hard to decide whether to overwrite or not.

To reproduce proceed like this:
1. Open Dolphin (ideally in split view)
2. Set a folder on every side, with file(s) off the same name in both
directories.
3. Drag file(s) from one side to the other and select "copy".
4. The presented confirmation dialogue asks if you want to overwrite the
destination file(s) but only shows the file name. Additional information like
date, size, etc. are missing.

Expected Results:
The confirmation dialogue should contain information like date, size, etc. for
source and destination file. 

Reproducible: Always

System used:

openSUSE 42.1
Kernel 4.3.0-21.g0e6e680-default x86_64
plasma5-workspace 5.4.3-6.1 x86_64
dolphin 15.08.3-4.2 x86_64
libQt5Core5 5.5.0-2.1 x86_64