Fix style of commit-filter links in commit-subject.

When using the commit-filter functionality to add e.g. bug tracker links to
commit messages, the style of those links is mangled by a CSS directive that
is meant to only apply to decorations that are listed on the commit-subject
line.

Fix this directive to only apply to the decorations.

Signed-off-by: Johan Herland <johan@herland.net>
Signed-off-by: Lars Hjemli <hjemli@gmail.com>

cgit.css

@@ -525,7 +525,10 @@ a.deco {
 	border: solid 1px #770000;
 }
 
-div.commit-subject a {
+div.commit-subject a.branch-deco,
+div.commit-subject a.tag-deco,
+div.commit-subject a.remote-deco,
+div.commit-subject a.deco {
 	margin-left: 1em;
 	font-size: 75%;
 }