Make RSS icon dark gray and only blue on hover

The other new icons (in package comments) behave the same way.
Signed-off-by: Marcel Korpel <marcel.korpel@gmail.com>
Signed-off-by: Lukas Fleischer <lfleischer@archlinux.org>

web/html/css/aurweb.css

@@ -112,13 +112,13 @@
 	top: 1px;
 }
 
-.delete-comment, .undelete-comment, .edit-comment, .pin-comment {
+.rss-icon, .delete-comment, .undelete-comment, .edit-comment, .pin-comment {
 	-webkit-filter: grayscale(100%);
 	filter: grayscale(100%);
 	opacity: 0.6;
 }
 
-.delete-comment:hover, .undelete-comment:hover, .edit-comment:hover, .pin-comment:hover {
+.rss-icon:hover, .delete-comment:hover, .undelete-comment:hover, .edit-comment:hover, .pin-comment:hover {
 	-webkit-filter: none;
 	filter: none;
 	opacity: 1;