Add support and message styles to login page
Formatting for paragraphs and links in alert box
Show the drop down even when no blogs are connected
Return blog auth error
Don’t prevent a user connecting if the primary blog details are unavailable

For example, blog has been disabled or is Jetpack without JSON API

Also remove unnecessary CSS, and add a support link
Better blog auth errors

Show better details when blog authing fails:
 - Jetpack issue
 - Disabled blog
Check user is logged in before letting them upload
If time is in the past then publish immediately