Make conical support invisible by default
Make conical support invisible by default

It is considered an 'expert setting' since it is fairly experimental.

Contributes to issue CURA-942.

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