Javascript lib: UX: When whiteOutReportSuccess() is called on a whiteout over a miniPrompt, the miniPrompt and whiteout are now flown out together. Also, a bit of improvement to message box DOM object destruction code; this fixes problems with message boxes appearing below the shade when ajax auth is done 3 or more times in one page load.

form.searchform, td#cell-sbleft {
  background-color: #2b2b2b;
  background-image: none;
}