Fix: Don't automatically persist or return _config_version
Fix: Don't automatically persist or return _config_version

Should only ever be read or written by the plugin system itself, not
by on_settings_save or on_settings_load

Jaesin/OctoPrint,beeverycreative/BEEweb,foosel/OctoPrint,foosel/OctoPrint,bicephale/OctoPrint,bicephale/OctoPrint,javivi001/OctoPrint,shohei/Octoprint,Salandora/OctoPrint,MoonshineSG/OctoPrint,Jaesin/OctoPrint,shohei/Octoprint,Jaesin/OctoPrint,shohei/Octoprint,shohei/Octoprint,javivi001/OctoPrint,senttech/OctoPrint,Salandora/OctoPrint,MoonshineSG/OctoPrint,chriskoz/OctoPrint,chriskoz/OctoPrint,beeverycreative/BEEweb,bicephale/OctoPrint,foosel/OctoPrint,Salandora/OctoPrint,JackGavin13/octoprint-test-not-finished,javivi001/OctoPrint,JackGavin13/octoprint-test-not-finished,beeverycreative/BEEweb,JackGavin13/octoprint-test-not-finished,Salandora/OctoPrint,bicephale/OctoPrint,senttech/OctoPrint,MoonshineSG/OctoPrint,chriskoz/OctoPrint,chriskoz/OctoPrint,beeverycreative/BEEweb,shohei/Octoprint,foosel/OctoPrint,MoonshineSG/OctoPrint,senttech/OctoPrint,Jaesin/OctoPrint,JackGavin13/octoprint-test-not-finished,senttech/OctoPrint