More wysihtml5/submission form cleanup.

 * On wysi5 toolbar, change the 'Ok' and 'Cancel' buttons back to
   default styles (this is on the add picture/url links option).
 * Title field is a text input field now, not textarea
 * Remove sidebar "Tips" section.
 * Remove JS that auto-opens first <dd> element.
 * Place wysihtml5 initialization JS in existing $(function()) call
 * Changed implementation of the CSS to remove the default 'outline'
   property values (for Title and Submission form elements only).
    * I discuss this in a comment on the pull request.
Change 'no-focus-outline' from CSS ID to Class

 * The Title submission tests were failing because I miss-used an ID.
   * In the Title input field, Rails wanted a 'submission_title' ID
     and I was giving a 'no-focus-outline' ID causing a number of
     Cucumber tests to fail. All tests are passing now.