Improve device connection dialog with radio buttons

[ryanfeeley]

In order to improve the quality of response, we should present the options are radio buttons, instead of hiding them under a drop-down menu.

DEFAULT:

SELECTED:

VALIDATION:

[ryanfeeley]

Although they are going to be harder to engineer than originally believed, the radio buttons are from about:addons.

[vladikoff]

We can extend the fxa-checkbox and include the radio controller form: https://getmdl.io/components/index.html#toggles-section sizes and styling can be tweaked

[ryanfeeley]

@vladikoff Howz about:

Reason for disconnecting…

• Suspicious device
• Lost or stolen device
• Old or replaced device
• Duplicate device
• Rather not say
• Other reason (provide text input?)

[vladikoff]

latest on this:

• use the new radio button css stuff from nightly, do not bother with the replacing and hiding the radio technique
• once the new styling stuff is in stable we should remove the fxa-checkbox and just use CSS stuff.