make 'settings' proper yaml
make 'settings' proper yaml

See PR #2530; I assumed it should go into 'devel' so it is right in new releases, but Gina asked for it to be done here.

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