Add log entry when opening a file via Qt event
Add log entry when opening a file via Qt event

This helps debugging CURA-730, and might also help debugging similar issues in the future. It's a user-triggered event so this warrants an info-level log entry.

Contributes to issue CURA-730.

fieldOfView/Cura,ynotstartups/Wanhao,hmflash/Cura,senttech/Cura,Curahelper/Cura,Curahelper/Cura,totalretribution/Cura,fieldOfView/Cura,totalretribution/Cura,ynotstartups/Wanhao,hmflash/Cura,senttech/Cura