add missing color to tool_button
add missing color to tool_button

fieldOfView/Cura,senttech/Cura,DeskboxBrazil/Cura,ynotstartups/Wanhao,lo0ol/Ultimaker-Cura,fxtentacle/Cura,hmflash/Cura,hmflash/Cura,ad1217/Cura,bq/Ultimaker-Cura,DeskboxBrazil/Cura,markwal/Cura,fxtentacle/Cura,quillford/Cura,totalretribution/Cura,ad1217/Cura,markwal/Cura,bq/Ultimaker-Cura,senttech/Cura,ynotstartups/Wanhao,fieldOfView/Cura,lo0ol/Ultimaker-Cura,derekhe/Cura,quillford/Cura,derekhe/Cura,totalretribution/Cura,Curahelper/Cura,Curahelper/Cura