Check if there is a current icon item in the device manager. Fixes #4604 #4555
Use constructor for QString and make format
Revert "Use constructor for QString and make format"

This reverts commit 5a2348fae6ea545d793e612414571caafbd5ad6f.
Use constructor for QString
Make format
Merge pull request #4605 from Chocobozzz/fix_device_icon

Check if there is a current icon item in the device manager. Fixes #4604 #4555