Fix File(Added|Removed) and Folder(Added|Removed) events
Fix File(Added|Removed) and Folder(Added|Removed) events

Were defined as 1-tuple instead of a string thanks to a syntax error.

Jaesin/OctoPrint,foosel/OctoPrint,JackGavin13/octoprint-test-not-finished,JackGavin13/octoprint-test-not-finished,Jaesin/OctoPrint,foosel/OctoPrint,JackGavin13/octoprint-test-not-finished,Jaesin/OctoPrint,foosel/OctoPrint,foosel/OctoPrint,Jaesin/OctoPrint,JackGavin13/octoprint-test-not-finished