Add modern theme

templates/channel.jade

@@ -38,7 +38,7 @@ html(lang="en")
           #main.row
             #chatwrap.col-lg-5.col-md-5
               #chatheader
-                i#userlisttoggle.glyphicon.glyphicon-chevron-up.pull-left.pointer(title="Show/Hide Userlist")
+                i#userlisttoggle.glyphicon.glyphicon-chevron-right.pull-left.pointer(title="Show/Hide Userlist")
                 span#usercount.pointer Not Connected
                 span#modflair.label.label-default.pull-right.pointer M
                 span#adminflair.label.label-default.pull-right.pointer A

templates/useroptions.jade

@@ -34,6 +34,7 @@ mixin us-general
             option(value="/css/themes/bootstrap-theme.min.css") Bootstrap
             option(value="/css/themes/slate.css") Slate
             option(value="/css/themes/cyborg.css") Cyborg
+            option(value="/css/themes/modern.css") Modern
       .form-group
         label.control-label.col-sm-4(for="#us-layout") Layout
         .col-sm-8