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>
<table>
<tr>
<td>Name</td>
<td>Description</td>
<td>Contact</td>
<td>Last change</td>
<td> </td>
<tr>
#entries%indexentry#
</table>
#footer#