Fixed a bug causing component become invisible when setting rate to zero
Fixed a bug causing component become invisible when setting rate to zero

cheton/cnc,cheton/cnc.js,cncjs/cncjs,cncjs/cncjs,cheton/cnc,cheton/piduino-grbl,cheton/cnc,cheton/cnc.js,cheton/cnc.js,cheton/piduino-grbl,cheton/piduino-grbl,cncjs/cncjs