hgweb: a couple of fixes on search page
- show search string in the bottom search box
- wrap search boxes within paragraphs, this also puts
some space between last changeset and bottom
search box in firefox.
#header#
<title>Mercurial repositories index</title>
</head>
<body>
<h2>Mercurial Repositories</h2>
The specified repository "#repo#" is unknown, sorry.
Please go back to the main repository list page.
#footer#