Fix cell semantics

The last cell is actually not the row header. Thus, 'th' must be
replaced by 'td' to restore table semantics.

lib/assets/stylesheets/reporting_engine/reporting.css.erb

@@ -81,6 +81,14 @@ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
   text-align: right;
 }
 
+.report .odd td.inner {
+  background-color: #e8e8e8;
+}
+
+.report .even td.inner {
+  background-color: #e3e3e3;
+}
+
 .report tr.even:hover .inner,
 .report tr.even:hover .bottom,
 .report tr.even:hover .empty,

lib/widget/table/report_table.rb

@@ -33,7 +33,7 @@ class Widget::Table::ReportTable < Widget::Table
     @walker.for_final_row do |row, cells|
       html = "<th scope='row' class='normal inner left'>#{show_row row}#{debug_fields(row)}</th>"
       html << cells.join
-      html << "<th class='normal inner right'>#{show_result(row)}#{debug_fields(row)}</th>"
+      html << "<td class='normal inner right'>#{show_result(row)}#{debug_fields(row)}</th>"
       html.html_safe
     end