Bug 1036787 SimCard Text Not Reflecting On Language Change

When DOM structure will slightly change this code will not work anymore. What do you think about using `querySelector` in here with `importSimOption` as a parent element to choose the button?
```javascript
var optionButton = importSimOption.querySelector('button'); //or something similar if button has a class etc.
```
I spend hours on looking for bugs caused by trusting order of DOM elements, life would be easier when we will be more specific on choosing them :).