Removin padding on page top

ws/Docbook/CustomLayer/slide/reveal.css.patch

---- reveal.css.orig	2017-06-28 18:42:33.234960726 +0200
-+++ reveal.css	2017-06-28 18:33:31.506979291 +0200
+--- reveal.css.orig	2017-07-29 11:57:15.565958324 +0200
++++ reveal.css	2017-07-29 11:39:42.453847752 +0200
 @@ -26,7 +26,7 @@
    border: 0;
    font-size: 100%;
@@ -9,3 +9,12 @@
  
  .reveal article, .reveal aside, .reveal details, .reveal figcaption, .reveal figure,
  .reveal footer, .reveal header, .reveal hgroup, .reveal menu, .reveal nav, .reveal section {
+@@ -339,7 +339,7 @@
+   display: none;
+   position: absolute;
+   width: 100%;
+-  padding: 20px 0px;
++  padding: 0px 0px;
+   z-index: 10;
+   -webkit-transform-style: preserve-3d;
+           transform-style: preserve-3d;