Describe the bug
Decidim provides a "toggle" UI element e.g. on the notification settings page at /notifications_settings.

I would assume that as a user browsing this page using keyboard, I would see which element is currently active that I am working with.

To Reproduce

1. Go to /notifications_settings
2. Using the TAB key, go to one of the UI toggles
3. Expect to see which element is active

Expected behavior
I would expect to see which toggle is active that I am working with.

Screenshots
Guess which toggle is active in this screenshot:

Answer: "I want to receive an email every time I receive a notification."

Stacktrace
N/A

Extra data (please complete the following information):

• Device: (any)
• Device OS: (any)
• Browser: using Chrome but I expect the same issue on all browsers
• Decidim Version: develop
• Decidim installation: any without CSS customizations

Additional context
N/A