Merge pull request #1112 from ggreer/ldap-css

Add tectonic-ldap matching rule to ldap icon.

web/static/main.css

@@ -73,7 +73,7 @@ body {
   background-image: url(../static/img/bitbucket-icon.svg);
 }
 
-.dex-btn-icon--ldap {
+.dex-btn-icon--ldap, .dex-btn-icon--tectonic-ldap {
   background-color: #84B6EF;
   background-image: url(../static/img/ldap-icon.svg);
 }