Fix dirwatching being stopped when using KIO::moveAs().

CopyJob calls stopDirScan to avoid notification storm (it uses KDirNotify
i.e. DBus to notify of the operation instead), and forgot to call
restartDirScan in the precise case of direct renaming. Moving a '}' fixed it.

With many thanks to Frank Reininghaus for another great unittest!

BUG: 311582
FIXED-IN: 4.10