Better error messaging for missing Address

[lduh]

https://cl.ly/1z1A0C023y0x

During setup - If the user doesn't include all the necessary address information, it doesn't save. (But it still displays the "Settings Saved" feedback) We need to inform the user WHY we aren't accepting their changes, and highlight the required fields.

Something like:

As part of the MailChimp Terms of Use, we require that a contact email and a physical mailing address.

(adapted from http://kb.mailchimp.com/lists/growth/about-the-required-email-footer-content)

[ryanhungate]

@lduh just pushed up a fix for this... give it a go!

[lduh]

I'm a dummy. @ryanhungate can we edit to

As part of the MailChimp Terms of Use, we require a contact email and a physical mailing address.

[ryanhungate]

@lduh yeah sorry I didn't even proofread that before copying it in.

[lduh]

looks good: https://cl.ly/0H29293L1g1y