I just had the thought while copying data from one directory that when I am asked if I want to overwrite a file that happens to be in the destination directory, the copying process stops. It might be annoying if we're copying a large directory overnight and it stops after a while because there are files in common. Perhaps it would be better if the copying process kept going on while dialog window is being shown, and whenever a problematic file is found, it is added to the queue of "to-ask items"?

Reproducible: Always

Steps to Reproduce:
1. Create a large directory A
2. Create a directory B with one of the files from A somewhere inside of it
3. Try to copy directories of A into B
Actual Results:  
In the middle of process of copying A contents into B, a dialog is being shown and the process pauses.

Expected Results:  
The dialog window is shown, but the process continues; if more than one problematic file was found, show another dialog window after making the decision in the first one.