hgweb: be consistent with the background highlighting on closed branches (Issue2386)

The coal and paper web themes will highlight closed branches as a visual cue to
the user. This patch makes the other two themes constistent.

For users with difficulty differentiating colors, it would be better to split
out closed branches to a new table or optionally hide them.

mercurial/templates/static/style-gitweb.css

@@ -33,6 +33,7 b' tr.light:hover, .parity0:hover { backgro'
 tr.dark, .parity1 { background-color:#f6f6f0; }
 tr.dark:hover, .parity1:hover { background-color:#edece6; }
 td { padding:2px 5px; font-size:12px; vertical-align:top; }
+td.closed { background-color: #99f; }
 td.link { padding:2px 5px; font-family:sans-serif; font-size:10px; }
 td.indexlinks { white-space: nowrap; }
 td.indexlinks a {

mercurial/templates/static/style-monoblue.css

@@ -204,6 +204,9 b' table tr td {'
 table tr td.nowrap {
   white-space: nowrap;
 }
+table tr td.closed { 
+  background-color: #99f; 
+}
 /*
 table tr.parity0:hover,
 table tr.parity1:hover {