SidbarSimple now uses container proxy correctly
SidbarSimple now uses container proxy correctly

Fixes CURA-823

Curahelper/Cura,senttech/Cura,hmflash/Cura,Curahelper/Cura,ynotstartups/Wanhao,hmflash/Cura,ynotstartups/Wanhao,totalretribution/Cura,totalretribution/Cura,fieldOfView/Cura,fieldOfView/Cura,senttech/Cura