Reset TFJS Model

### Howto

1. Set a flag `flagResetModel`
2. Modify `getTfjsModel`
```
if(flagResetModel){
  // init new model
  flagResetModel.value = False
}else{
  // do the same stuff as before
}
```

### Todo

- [ ] Reset Button
- [ ] `flagResetModel = ref(False)`
- [ ] Modify **`getTfjsModel`

