/index: industry drop-down error message

[globusharris]

From Slack:

I find the industry drop-down error message being inconsistent with the other table error messages to be a bit confusing. I can fill everything out, click the verification checkbox, and even click the submit button without ever choosing an industry. Then I get a modal message that’s confusing because it just says that Your selection "-" does not exist. Please try again.. I didn’t immediately figure out what was missing.

We should certainly change the text in the modal to say that the user should select an industry at the top of the page.

But we should probably not allow them to click the submit button in the first place if they haven’t selected an industry. This leaves the red-text error messages that come up for verification as the only other alternative.

[globusharris]

Resolved in open PR from IGH_industryError branch