Slack messages now show the visitor's company

When a visitor has given a work email, in this session or an earlier one, the Slack message about their session now says which company they're from, so you can tell whether they fit before opening the session.

Under the line about the visitor, you'll see the company's name (or its domain, when its website doesn't say), whether it sells to businesses or consumers, what it sells, where it's based and roughly how many people work there, such as "Acme · B2B · HR software for mid-sized companies · Germany · 51–200 employees". Most of this comes from the company's own website. Its size, and its location when the website doesn't say, come from a company database. Anything we couldn't find out is left out, and visitors who have only given a personal email address get no company line.