QIODevice read warning in Application Output

I get an output in the Application Output from the wizard preset loading saying

QIODevice::read (QFile, "/home/hag/Documents/dev/QtProject/qtdesignstudio/UserPresets.json"): device not open

because I don't have that file. Every user that starts fresh will get this output as the UserPresets.json is only created when user presets are created.

/qtcreator/src/plugins/studiowelcome/userpresets.cpp:46 in this line as well as in /qtcreator/src/plugins/studiowelcome/userpresets.cpp:55 there needs to be check if the open method actually returns true.