Fix: Receiving a "start" from the firmware triggers another handshake attempt
Fix: Receiving a "start" from the firmware triggers another handshake attempt

Fixes #869

Mikk36/OctoPrint,MoonshineSG/OctoPrint,dragondgold/OctoPrint,EZ3-India/EZ-Remote,senttech/OctoPrint,foosel/OctoPrint,spapadim/OctoPrint,Salandora/OctoPrint,mrbeam/OctoPrint,shaggythesheep/OctoPrint,Voxel8/OctoPrint,nickverschoor/OctoPrint,sstocker46/OctoPrint,spapadim/OctoPrint,JackGavin13/octoprint-test-not-finished,beeverycreative/BEEweb,senttech/OctoPrint,uuv/OctoPrint,MoonshineSG/OctoPrint,leductan-nguyen/RaionPi,nicanor-romero/OctoPrint,ErikDeBruijn/OctoPrint,mcanes/OctoPrint,bicephale/OctoPrint,beeverycreative/BEEweb,JackGavin13/octoprint-test-not-finished,bicephale/OctoPrint,CapnBry/OctoPrint,Javierma/OctoPrint-TFG,nicanor-romero/OctoPrint,javivi001/OctoPrint,alex1818/OctoPrint,Javierma/OctoPrint-TFG,Mikk36/OctoPrint,chriskoz/OctoPrint,SeveQ/OctoPrint,mrbeam/OctoPrint,javivi001/OctoPrint,markwal/OctoPrint,chriskoz/OctoPrint,CapnBry/OctoPrint,ErikDeBruijn/OctoPrint,nickverschoor/OctoPrint,punkkeks/OctoPrint,jneves/OctoPrint,shohei/Octoprint,Skeen/OctoPrint,Jaesin/OctoPrint,ryanneufeld/OctoPrint,spapadim/OctoPrint,sstocker46/OctoPrint,Javierma/OctoPrint-TFG,punkkeks/OctoPrint,Skeen/OctoPrint,Salandora/OctoPrint,MaxOLydian/OctoPrint,eliasbakken/OctoPrint,Skeen/OctoPrint,Salandora/OctoPrint,foosel/OctoPrint,mcanes/OctoPrint,jneves/OctoPrint,masterhou/OctoPrint,SeveQ/OctoPrint,shohei/Octoprint,JackGavin13/octoprint-test-not-finished,eddieparker/OctoPrint,Voxel8/OctoPrint,eddieparker/OctoPrint,ryanneufeld/OctoPrint,dansantee/OctoPrint,EZ3-India/EZ-Remote,markwal/OctoPrint,chriskoz/OctoPrint,Jaesin/OctoPrint,javivi001/OctoPrint,MoonshineSG/OctoPrint,eddieparker/OctoPrint,mayoff/OctoPrint,dansantee/OctoPrint,shaggythesheep/OctoPrint,sstocker46/OctoPrint,MoonshineSG/OctoPrint,ErikDeBruijn/OctoPrint,dansantee/OctoPrint,beeverycreative/BEEweb,alex1818/OctoPrint,mayoff/OctoPrint,mrbeam/OctoPrint,nickverschoor/OctoPrint,foosel/OctoPrint,uuv/OctoPrint,SeveQ/OctoPrint,bicephale/OctoPrint,bicephale/OctoPrint,Mikk36/OctoPrint,mayoff/OctoPrint,nicanor-romero/OctoPrint,masterhou/OctoPrint,alex1818/OctoPrint,EZ3-India/EZ-Remote,leductan-nguyen/RaionPi,senttech/OctoPrint,punkkeks/OctoPrint,MaxOLydian/OctoPrint,leductan-nguyen/RaionPi,JackGavin13/octoprint-test-not-finished,ryanneufeld/OctoPrint,shohei/Octoprint,beeverycreative/BEEweb,foosel/OctoPrint,CapnBry/OctoPrint,dragondgold/OctoPrint,CapnBry/OctoPrint,MaxOLydian/OctoPrint,Voxel8/OctoPrint,Jaesin/OctoPrint,EZ3-India/EZ-Remote,jneves/OctoPrint,nickverschoor/OctoPrint,markwal/OctoPrint,senttech/OctoPrint,eliasbakken/OctoPrint,eliasbakken/OctoPrint,chriskoz/OctoPrint,masterhou/OctoPrint,Jaesin/OctoPrint,mcanes/OctoPrint,dragondgold/OctoPrint,shohei/Octoprint,leductan-nguyen/RaionPi,Javierma/OctoPrint-TFG,shaggythesheep/OctoPrint,uuv/OctoPrint,Salandora/OctoPrint,shohei/Octoprint,ryanneufeld/OctoPrint