support for bootstrap4

applications/welcome/views/default/index.html

@@ -1,15 +1,9 @@
-{{left_sidebar_enabled,right_sidebar_enabled=False,('message' in globals())}}
 {{extend 'layout.html'}}
 
 {{block header}}
-    <header class="container-fluid background">
-      <div class="jumbotron text-center">
-        {{if response.title:}}
-        <h1>{{=response.title}}
-          <small>{{=response.subtitle or ''}}</small></h1>
-        {{pass}}
-      </div>
-    </header>
+<center style="background-color: #333; color:white; padding:30px">
+  <h1>/{{=request.application}}/{{=request.controller}}/{{=request.function}}
+</center>
 {{end}}
 
 {{if 'message' in globals():}}
@@ -27,26 +21,20 @@
     _href=URL('admin','default','peek',args=(request.application,'views',request.controller,'index.html')))))}}</li>
   <li>{{=T('You can modify this application and adapt it to your needs')}}</li>
 </ol>
+<center style="padding:50px">
+  <a class="btn btn-primary" href="{{=URL('admin','default','index')}}">
+    <i class="glyphicon glyphicon-cog"></i>
+    {{=T("admin")}}
+  </a>
+  <a class="btn btn-secondary" href="{{=URL('examples','default','index')}}">{{=T("Online examples")}}</a>
+  <a class="btn btn-secondary" href="http://web2py.com">web2py.com</a>
+  <a class="btn btn-secondary" href="http://web2py.com/book">{{=T('Documentation')}}</a>
+</center>
 {{elif 'content' in globals():}}
 {{=content}}
 {{else:}}
 {{=BEAUTIFY(response._vars)}}
 {{pass}}
 
-{{block right_sidebar}}
-<div class="panel panel-info">
-  <div class="panel-heading"><h3 class="panel-title"><a class="btn-block"
-      href="{{=URL('admin','default','index')}}">
-      <i class="glyphicon glyphicon-cog"></i>
-      {{=T("admin")}}
-    </a></h3></div>
-  <div class="panel-body">
-    {{=T("Don't know what to do?")}}
-  </div>
-  <ul class="list-group">
-    <li class="list-group-item">{{=A(T("Online examples"), _href=URL('examples','default','index'))}}</li>
-    <li class="list-group-item"><a href="http://web2py.com">web2py.com</a></li>
-    <li class="list-group-item"><a href="http://web2py.com/book">{{=T('Documentation')}}</a></li>
-  </ul>
-</div>
-{{end}}
+
+