fix cestina + help button

sifrovacka/templates/stage.html

@@ -35,8 +35,13 @@
      </br>
      </br>
      <div>
-      <button class="collapsible btn btn--fullwidth btn--grey-700 " type="button">
-       <div class="btn__body "> Klikni pro nápovědu</div>
+      <button class="collapsible btn btn--fullwidth btn--grey-700 btn--icon btn--inverted-icon " type="button">
+       <div class="btn__body-wrap ">
+        <div class="btn__body" > Klikni pro nápovědu</div>
+        <div class="btn__icon ">
+         <i class="ico--book"></i>
+        </div>
+       </div>
       </button>
       <div class="content">
        <p>{{ stage_current_id.stage_help }}</p>