fix docsearch modal style

Author: vincentlauvlwj

themes/doc/layout/home.ejs

@@ -44,6 +44,7 @@
                     </a>
                     <p class="card-description">
                         <%- item.description %>
+                        <br/><br/><br/><br/>
                     </p>
                 </div>
             </div>

themes/doc/source/style/_doc/layout.scss

@@ -50,3 +50,9 @@ body {
 .doc-sidebar__vertical-menu {
   display: none;
 }
+
+.DocSearch-Container {
+  position: fixed !important;
+  width: 100% !important;
+  height: 100% !important;
+}