Never disable the view button
Never disable the view button

Fixes #443
CURA-225 #done

ad1217/Cura,ynotstartups/Wanhao,ad1217/Cura,bq/Ultimaker-Cura,fieldOfView/Cura,Curahelper/Cura,markwal/Cura,hmflash/Cura,bq/Ultimaker-Cura,Curahelper/Cura,ynotstartups/Wanhao,fxtentacle/Cura,totalretribution/Cura,totalretribution/Cura,markwal/Cura,senttech/Cura,hmflash/Cura,fxtentacle/Cura,senttech/Cura,fieldOfView/Cura