Change toggle to more meaningful term

In the log interface, there is a toggle link at the top, but it isn't clear
what's being toggled.  I've changed it to "Expand" and "Collapse" to make it
clear that you are getting more and less information, respectively.

Signed-off-by: Justin Waters <justin.waters@timesys.com>

ui-log.c

@@ -165,7 +165,8 @@ void cgit_print_log(const char *tip, int ofs, int cnt, char *grep, char *pattern
 	      "<th class='left'>Commit message");
 	if (pager) {
 		html(" (");
-		cgit_log_link("toggle", NULL, NULL, ctx.qry.head, ctx.qry.sha1,
+		cgit_log_link(ctx.qry.showmsg ? "Collapse" : "Expand", NULL,
+			      NULL, ctx.qry.head, ctx.qry.sha1,
 			      ctx.qry.path, ctx.qry.ofs, ctx.qry.grep,
 			      ctx.qry.search, ctx.qry.showmsg ? 0 : 1);
 		html(")");