Refactor and make labels clickable for checkboxes

we use `gf-form-switch`, but we don't use "label" feature, so it like in example:
```
<div class="gf-form">
      <gf-form-switch
        checked="ctrl.flag1"
        label="Enabled"
      />
      <gf-form-switch
        checked="ctrl.flag1"
        label="Stop on hover"
      />
</div>
```

...notice that `gf-form-switch` are siblings. 