only show themepicker when there is a board on screen

app/views/base/layout.scala.html

@@ -75,7 +75,7 @@ signedJs: Option[String] = None)(body: Html)(implicit ctx: Context)
         @trans.nbConnectedPlayers("<strong>?</strong>")
       </div>
       <a id="reconnecting" onclick="location.reload();">@trans.reconnecting()</a>
-      <div class="themepicker">
+      <div class="themepicker none">
         <a class="theme_toggle toggle" href="#"><span class="s16 ddown">@trans.color()</span></a>
         <div class="themes dropdown" data-href="@routes.Setting.set("theme")">
           @themeList.map { theme =>

public/javascripts/big.js

@@ -458,6 +458,7 @@ var lichess_sri = Math.random().toString(36).substring(5); // 8 chars
     }, 1000);
 
     if ($board = $('div.with_marks').orNot()) {
+      $('#top .themepicker').show();
       $.displayBoardMarks($board.parent(), $('#lichess > div.lichess_player_white').length);
     }
 

public/javascripts/pgn4hacks.js

@@ -77,6 +77,7 @@ function customFunctionOnMove() {
 
 function redrawBoardMarks() {
   $.displayBoardMarks($('#GameBoard'), !$('#GameBoard').hasClass('flip'));
+  $('#top .themepicker').show();
 }
 
 function refreshButtonset() {