add warning modal element

[juliangruber]

required for #245.

@yoshuawuyts how are we going to do this?

[yoshuawuyts]

After #285 we should have a modal.js file - can take the same approach as with buttons.js where we'd call something like modal.warning()

[juliangruber]

sgtm!

[yoshuawuyts]

Building choo v5 side tracked me a whole bunch - I should spend some time on this tho; feel free to take over if it's blocking you right now

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On Fri, Mar 3, 2017 at 3:49 PM Julian Gruber ***@***.***> wrote: required for #245 <#245>. @yoshuawuyts <https://github.com/yoshuawuyts> how are we going to do this? — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#292>, or mute the thread <https://github.com/notifications/unsubscribe-auth/ACWleuhrei-0aeuae-M12QLZOaGZqgyxks5riCiDgaJpZM4MSWBf> .

[juliangruber]

part of #295

[yoshuawuyts]

Closed as per ^