Optimize Menu.makeButton().

src/Filtering/PostHiding.coffee

@@ -168,7 +168,7 @@ PostHiding =
       className: 'stub'
     $.add post.nodes.stub, a
     if Conf['Menu']
-      $.add post.nodes.stub, [$.tn(' '), Menu.makeButton()]
+      $.add post.nodes.stub, Menu.makeButton()
     $.prepend post.nodes.root, post.nodes.stub
 
   show: (post, showRecursively=Conf['Recursive Hiding']) ->

src/Filtering/ThreadHiding.coffee

@@ -124,7 +124,7 @@ ThreadHiding =
     thread.stub = $.el 'div',
       className: 'stub'
     if Conf['Menu']
-      $.add thread.stub, [a, $.tn(' '), Menu.makeButton()]
+      $.add thread.stub, [a, Menu.makeButton()]
     else
       $.add thread.stub, a
     $.prepend root, thread.stub

src/Menu/Menu.coffee

@@ -9,22 +9,22 @@ Menu =
 
   node: ->
     if @isClone
-      button = $ '.menu-button', @nodes.info
-      $.on button, 'click', Menu.toggle
+      $.on $('.menu-button', @nodes.info), 'click', Menu.toggle
       return
-    button = Menu.makeButton()
-    $.add @nodes.info, [$.tn('\u00A0'), button]
+    $.add @nodes.info, Menu.makeButton()
 
   makeButton: do ->
-    a = null
+    frag = null
     ->
-      a or= $.el 'a',
-        className: 'menu-button'
-        innerHTML: '[<i></i>]'
-        href:      'javascript:;'
-      button = a.cloneNode true
-      $.on button, 'click', Menu.toggle
-      button
+      unless frag
+        a = $.el 'a',
+          className: 'menu-button'
+          innerHTML: '[<i></i>]'
+          href:      'javascript:;'
+        frag = $.nodes [$.tn(' '), a]
+      clone = frag.cloneNode true
+      $.on clone.lastElementChild, 'click', Menu.toggle
+      clone
 
   toggle: (e) ->
     try