jquery-ui sliders for grimace disable/enable 

The sliders for Grimace doesn't enable when you deselect it
it comes that a value stay in the array
check console, value should be all reset to 0 after slide out

```
Object
    anger: 0
    disgust: 0
    fear: 0.01
    joy: 0
    sadness: 0.01
    surprise: 0
    __proto__: Object
```
