1.3.4dev: place group heading in td element of TracQuery tabular results

The nu validator reported the previous `<th> <h2>...</h2> </th>`
embedding as invalid:
{{{
The element h2 must not appear as a descendant of the th element.
}}}

Refs #12752.


git-svn-id: http://trac.edgewall.org/intertrac/log:/trunk@16880 af82e41b-90c4-0310-8c96-b1721e28e2e2

trac/htdocs/css/report.css

@@ -84,7 +84,7 @@ h1 .numrows, h2 .numrows {
 h2.report-result {
  background: #f7f7f7;
  border-bottom: 1px solid #d7d7d7;
- margin: 2em 0 0;
+ margin: 2em 0 .6em 0;
  padding: .2em .4em;
  box-shadow: 1px 1px .5em 0 #ccc;
  border-radius: .1em
@@ -221,7 +221,7 @@ h2.report-result {
 /* Query results table */
 
 table.tickets caption.trac-group {
- padding: .1em .5em 1em .5em;
+ padding: .1em .5em; /* same as .tickets tbody td */
  border: 1px dotted #ddd;
  text-align: left;
 }

trac/ticket/templates/query_results.html

@@ -90,9 +90,9 @@ <h2 class="report-result" >
     <tbody class="trac-query-heading">
       #     if groupname is not none:
       <tr class="trac-group">
-        <th class="trac-colspan" colspan="${num_cols}">
+        <td class="trac-colspan" colspan="${num_cols}">
           ${group_heading(groupname, results)}
-        </th>
+        </td>
       </tr>
       #     endif
       ${column_headers()}