Fix a bug that the dropdown button was not disabled when sending G-code commands
Fix a bug that the dropdown button was not disabled when sending G-code commands

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