Adds missing .icon-download CSS class (#25999).

git-svn-id: http://svn.redmine.org/redmine/trunk@16650 e93f8b46-1217-0410-a6f0-8f06a7374b81

public/stylesheets/application.css

@@ -1215,6 +1215,7 @@ div.wiki img {vertical-align:middle; max-width:100%;}
 .icon-del { background-image: url(../images/delete.png); }
 .icon-move { background-image: url(../images/move.png); }
 .icon-save { background-image: url(../images/save.png); }
+.icon-download { background-image: url(../images/save.png); }
 .icon-cancel { background-image: url(../images/cancel.png); }
 .icon-multiple { background-image: url(../images/table_multiple.png); }
 .icon-folder { background-image: url(../images/folder.png); }