bug#6510: Search form not at top of bugs landing page.

[Karl Fogel]

On pages like:

http://debbugs.gnu.org/cgi/pkgreport.cgi?package=emacs;max-bugs=100;base-order=1;bug-rev=1

...the search form should probably be at the top, since searching is
extremely common (the web logs might confirm that it's more common than
actually clicking on a bug found directly on one of the listing pages).

Best,
-Karl