fix(record): keep record button out of header

app/renderer/components/sensor/header/index.jsx

@@ -4,15 +4,13 @@ import ActivityIndicator from '../activity_indicator'
 import { withStyles } from '@material-ui/core/styles'
 import styles from '../../../styles/'
 import StopWatch from '../../stop_watch/'
-import RecordButton from '../record_button/'
 
 export const Header = (props) => {
   const { classes, sensor } = props
   return (
     <div className={classes.cardHeader}>
       <ActivityIndicator fontSize="small" active={sensor.active} />
       <div className={classes.cardName}>{sensor.name}&nbsp;</div>
-      <RecordButton sensor={sensor} />
       <StopWatch sensor={sensor} />
     </div>
   )