Resolve dead lock issue in job_on_hold implementation
Resolve dead lock issue in job_on_hold implementation

(Hopefully) closes #2677

Jaesin/OctoPrint,Jaesin/OctoPrint,Jaesin/OctoPrint,foosel/OctoPrint,foosel/OctoPrint,foosel/OctoPrint,foosel/OctoPrint,Jaesin/OctoPrint