change tarball to tar file
Merge pull request #714 from strongloop/feature/tar-file-text

change tarball to tar file

#648
Hide spinner controls from port input fields

A bit of CSS hackery to prevent browsers from displaying spinner
controls on thenport input field. The spinbox controls show up on these
fields because their input type is set to number, and in HTML5 that
means display spinbox controls.

Fixes #710
Remove generated css file
add unsupported icons to landing page

- hide hover and default icons
- only show unsupported icon when app is unsupported in context