css: highlight even table rows and skip empty rows

This is stolen from kernel.org css [0].

[0] https://git.kernel.org/cgit-korg-0.10.1.css

cgit.css

@@ -134,14 +134,34 @@ div#cgit table.list tr.logheader {
 	background: #eee;
 }
 
+div#cgit table.list tr:nth-child(even) {
+	background: #f7f7f7;
+}
+
+div#cgit table.list tr:nth-child(odd) {
+	background: white;
+}
+
 div#cgit table.list tr:hover {
 	background: #eee;
 }
 
+div#cgit table.list tr.nohover {
+	background: white;
+}
+
 div#cgit table.list tr.nohover:hover {
 	background: white;
 }
 
+div#cgit table.list tr.nohover-highlight:hover:nth-child(even) {
+	background: #f7f7f7;
+}
+
+div#cgit table.list tr.nohover-highlight:hover:nth-child(odd) {
+	background: white;
+}
+
 div#cgit table.list th {
 	font-weight: bold;
 	/* color: #888;

ui-log.c

@@ -263,8 +263,9 @@ static void print_commit(struct commit *commit, struct rev_info *revs)
 
 	html("</td></tr>\n");
 
-	if (revs->graph || ctx.qry.showmsg) { /* Print a second table row */
-		html("<tr class='nohover'>");
+	if ((revs->graph && !graph_is_commit_finished(revs->graph))
+			|| ctx.qry.showmsg) { /* Print a second table row */
+		html("<tr class='nohover-highlight'>");
 
 		if (ctx.qry.showmsg) {
 			/* Concatenate commit message + notes in msgbuf */

ui-repolist.c

@@ -321,7 +321,7 @@ void cgit_print_repolist(void)
 		    (last_section != NULL && section == NULL) ||
 		    (last_section != NULL && section != NULL &&
 		     strcmp(section, last_section)))) {
-			htmlf("<tr class='nohover'><td colspan='%d' class='reposection'>",
+			htmlf("<tr class='nohover-highlight'><td colspan='%d' class='reposection'>",
 			      columns);
 			html_txt(section);
 			html("</td></tr>");