MIME type: Calling QC with non-existent session / file displays different messagebox

Not sure if this is an issue at all, but...

Steps to reproduce:

• open QC from commandline by passing a name of a non-existent session or a non-existent file

Current result:

• QC states it cannot open empty files with Binary Editor

Former versions of QC:

• QC displayed messagebox of 'Cannot open xyz for reading: No such file or directory'

Note: on cmdline there's additional output of

static Core::IEditor* Core::EditorManager::createEditor(Core::Id, const QString&) unable to determine mime type of /qtrepo/qt-creator/blablabla/. Falling back to text/plain