Bug 1101085 - [FTE] Header does not change to network name on password s...

...creen during FTU.
we can make use toggle here (with the enforcer)
```javascript
this.currentStep <= numSteps &&
  UIManager.activationScreen.classList.toggle('no-options', steps[this.currentStep].hash !== '#wifi');
```

so we can get rid of line 186 [https://github.com/mozilla-b2g/gaia/pull/26290/files#diff-870058003588bd48d96ceec41624b685L186]