tweak bzed's theme

tweak bzed's theme

* move dotted border from bottom inlinecontent to top inlinefooter,
  and allow inlinefooter to clear floating content. This way, floating
  images do not hang down through the dotted border
* don't reset inputs and textareas, it makes buttons in forms
  all squash up together
* don't eliminate fieldsets, it makes the web setup page a
  mess
* only force the size of the search box. ikiwiki generally picks
  form field sizes with a reasonable good reason
* remove some custom css classes not used
* remove some trailing whitespace