GitLab

When trying to open a non-existing file with the binary editor, it would
complain that it couldn't empty files, instead of complaining that the
file does not exist.

Change-Id: I50fc8afb8c59cad211ee68356020a81891708097
Task-number: QTCREATORBUG-14078
Reviewed-by: Christian Stenger <christian.stenger@theqtcompany.com>