Update index css classes for full-width buttons (#495)

Co-authored-by: delsim <dev@gibbsconsulting.ca>

Author: delsim

demo/demo/templates/index.html

@@ -9,47 +9,47 @@ <h1>Demonstration Application</h1>
   <table class="table table-bordered table-striped">
     <tbody>
       <tr>
-        <td><a class="btn btn-primary btn-block" href="{%url "demo-one"%}">Demo One</a></td>
+        <td><a class="btn btn-primary btn-block w-100" href="{%url "demo-one"%}">Demo One</a></td>
         <td>Direct insertion of one or more Dash applications into a Django template</td>
       </tr>
       <tr>
-        <td><a class="btn btn-primary btn-block" href="{%url "demo-two"%}">Demo Two</a></td>
+        <td><a class="btn btn-primary btn-block w-100" href="{%url "demo-two"%}">Demo Two</a></td>
         <td>Storage of application initial state within Django</td>
       </tr>
       <tr>
-        <td><a class="btn btn-primary btn-block" href="{%url "demo-three"%}">Demo Three<a/></td>
+        <td><a class="btn btn-primary btn-block w-100" href="{%url "demo-three"%}">Demo Three<a/></td>
         <td>Adding Django features with enhanced callbacks</td>
       </tr>
       <tr>
-        <td><a class="btn btn-primary btn-block" href="{%url "demo-four"%}">Demo Four</a></td>
+        <td><a class="btn btn-primary btn-block w-100" href="{%url "demo-four"%}">Demo Four</a></td>
         <td>Live updating of apps by pushing from the Django server</td>
       </tr>
       <tr>
-        <td><a class="btn btn-primary btn-block" href="{%url "demo-five"%}">Demo Five</a></td>
+        <td><a class="btn btn-primary btn-block w-100" href="{%url "demo-five"%}">Demo Five</a></td>
         <td>Injection of a Dash application without embedding in an html iframe</td>
       </tr>
       <tr>
-        <td><a class="btn btn-primary btn-block" href="{%url "demo-six"%}">Demo Six</a></td>
+        <td><a class="btn btn-primary btn-block w-100" href="{%url "demo-six"%}">Demo Six</a></td>
         <td>Simple html injection example</td>
       </tr>
       <tr>
-        <td><a class="btn btn-primary btn-block" href="{%url "demo-seven"%}">Demo Seven</a></td>
+        <td><a class="btn btn-primary btn-block w-100" href="{%url "demo-seven"%}">Demo Seven</a></td>
         <td>Dash-bootstrap-components example</td>
       </tr>
       <tr>
-        <td><a class="btn btn-primary btn-block" href="{%url "demo-eight"%}">Demo Eight</a></td>
+        <td><a class="btn btn-primary btn-block w-100" href="{%url "demo-eight"%}">Demo Eight</a></td>
         <td>Django session state example</td>
       </tr>
       <tr>
-        <td><a class="btn btn-primary btn-block" href="{%url "demo-nine"%}">Demo Nine</a></td>
+        <td><a class="btn btn-primary btn-block w-100" href="{%url "demo-nine"%}">Demo Nine</a></td>
           <td>Local serving of assets</td>
       </tr>
       <tr>
-        <td><a class="btn btn-primary btn-block" href="{%url "demo-ten"%}">Demo Ten</a></td>
+        <td><a class="btn btn-primary btn-block w-100" href="{%url "demo-ten"%}">Demo Ten</a></td>
         <td>Callback with multiple return values</td>
       </tr>
       <tr>
-        <td><a class="btn btn-primary btn-block" href="{%url "demo-eleven"%}">Demo Eleven</a></td>
+        <td><a class="btn btn-primary btn-block w-100" href="{%url "demo-eleven"%}">Demo Eleven</a></td>
         <td>Dash Mantine Components</td>
       </tr>
     </tbody>