Viewer w/Public Annotations: Login box should use home page format

[amandabee]

Current:

Better:

• "Email" not "Email Address"
• Field names inside the field
• Forgot your password link available
• - Modal doesn't need a "login" title to the right of the DocumentCloud logo -

[amandabee]

I guess that https://www.documentcloud.org/login has the title to the right of the logo, so that can stay, but the modal layout on the home page is more elegant.