QtIFW

Solve the target path till we find the first existing dir.

Since canonicalPath might return an empty path if the target
does not exist yet, we need to cd up on the path till we find
the first existing one. Solves the problem that we would never
return a valid volume, as empty paths can't be matched...

Change-Id: Ia60bd68c43a5bac34ba612915aa5a3d572b64945
Reviewed-by: Alexander Lenhardt <alexander.lenhardt@nokia.com>
Reviewed-by: Tim Jenssen <tim.jenssen@nokia.com>