Jetpack Plugins: remote management error should poll for changes

[v18]

Reported by rickybanister. To reproduce:

1. Set up a new Jetpack site
2. Connect to WordPress.com
3. Do not enable remote management
4. Visit a plugin page
5. See this error:
   
6. Click the helpful blue button
7. Turn on remote management
8. Close the wp-admin tab
9. Land back on calypso tab, & still see the error above

Since I'd fixed the situation I was annoyed to see the error when I landed back on that page. I'm smart enough (sort of) to know that I could have refreshed the page and see the correct thing, but I wanted that page to poll for updates to the Jetpack connection and be ready for me to manage plugins when I got back.

Can we change it to listen for changes once the blue button is clicked?

[enejb]

This part is fixed now since the data if a site has manage enabled is part of the me/sites api endpoint. Which is currently being pulled.
Feel free to open this if you find this not to be the case.