shorten chess table when possible

app/templating/AssetHelper.scala

@@ -7,7 +7,7 @@ import play.api.templates.Html
 
 trait AssetHelper {
 
-  val assetVersion = 91
+  val assetVersion = 92
 
   def cssTag(name: String) = css("stylesheets/" + name)
 

public/javascripts/game.js

@@ -519,7 +519,11 @@ $.widget("lichess.game", {
     });
   },
   centerTable: function() {
-    this.$table.css('top', (256 - this.$table.height() / 2) + 'px');
+    var self = this;
+    self.$table.find(".lichess_control").each(function() {
+      $(this).toggleClass("none", $(this).html().trim() == "");
+    });
+    self.$table.css('top', (256 - self.$table.height() / 2) + 'px');
   },
   initClocks: function() {
     var self = this;

todo

@@ -49,7 +49,6 @@ tournament detect leavers and withdraw them (started) (also use force resign)
 -> or show current tournament on every page, with (join) and (redraw) buttons
 tournament warmup games
 send lobby new forum posts html through websockets
-in table, hide lichess_control when it's empty (watcher mode)
 BUG tournament idle resign: based on 20 seconds added time! can make black resign by playing after 19s
 tournament join, sometimes withdraws by cron
 AI thinks during your time (premove?) http://en.lichess.org/forum/lichess-feedback/y-u-so-greedy-with-time-stockfish#4