Various style tweaks for the promotion tools admin.
 * Like in Rap, stick all the notice styles in one file.
 * Cleanup the details styles
 * Rework some of the displayed sections on the details. Again, this mimics what we're doing elsewhere in Rap.
Add back margin to the #results_message

This was accidently removed in e8981fa
Merge pull request #11 from isaacgrant/admin-style-cleanup

Various style tweaks for the promotion tools admin.