Allow marking plugins as uninstalled
Allow marking plugins as uninstalled

Sometimes they will still get discovered by python even though their packages have since been uninstalled.
This will also lead to them being reloaded after an uninstall and a subsequent plugin reload.

Marking them as uninstalled and not handing out uninstalled plugins when collecting them solves this.

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