Monitor content override the "Map Directory To" option if the source directory start with a mount point

If there is a valid specified "Map Directory To" we should use it instead of overriding it with the source folder mount point.

extract the project that is zip in the UDN forum link provided
drop a fbx into the folder /Game/Assets/Props/
The content monitor should propose to import the file
Import the file

RESULT
The file is import in /Game/Props

EXPECTED RESULT
The file is import in /Game/Assets/Props