Update beta manual

src/extra/manual/beta/_static/basic.css

@@ -4,7 +4,7 @@
  *
  * Sphinx stylesheet -- basic theme.
  *
- * :copyright: Copyright 2007-2018 by the Sphinx team, see AUTHORS.
+ * :copyright: Copyright 2007-2017 by the Sphinx team, see AUTHORS.
  * :license: BSD, see LICENSE for details.
  *
  */
@@ -81,26 +81,10 @@ div.sphinxsidebar input {
     font-size: 1em;
 }
 
-div.sphinxsidebar #searchbox form.search {
-    overflow: hidden;
-}
-
 div.sphinxsidebar #searchbox input[type="text"] {
-    float: left;
-    width: 80%;
-    padding: 0.25em;
-    box-sizing: border-box;
+    width: 170px;
 }
 
-div.sphinxsidebar #searchbox input[type="submit"] {
-    float: left;
-    width: 20%;
-    border-left: none;
-    padding: 0.25em;
-    box-sizing: border-box;
-}
-
-
 img {
     border: 0;
     max-width: 100%;
@@ -215,11 +199,6 @@ table.modindextable td {
 
 /* -- general body styles --------------------------------------------------- */
 
-div.body {
-    min-width: 450px;
-    max-width: 800px;
-}
-
 div.body p, div.body dd, div.body li, div.body blockquote {
     -moz-hyphens: auto;
     -ms-hyphens: auto;
@@ -353,11 +332,6 @@ table.docutils {
     border-collapse: collapse;
 }
 
-table.align-center {
-    margin-left: auto;
-    margin-right: auto;
-}
-
 table caption span.caption-number {
     font-style: italic;
 }
@@ -431,13 +405,6 @@ table.field-list td, table.field-list th {
     hyphens: manual;
 }
 
-/* -- hlist styles ---------------------------------------------------------- */
-
-table.hlist td {
-    vertical-align: top;
-}
-
-
 /* -- other body styles ----------------------------------------------------- */
 
 ol.arabic {