Accounts: Add edit and delete pages; implement forms (no real actions yet)

templates/accounts.html.twig

@@ -5,7 +5,12 @@
 {% block content %}
     <h2>Accounts</h2>
 
-    <p>List of all mail accounts.</p>
+    <p>
+        <b>Actions:</b>
+        <a href="/accounts/new">Create account</a>
+    </p>
+
+    <h3>List of accounts</h3>
 
     <div class="filter_options">
         <form action="/accounts" method="GET">
@@ -19,7 +24,7 @@
 
     <input type="checkbox" id="show_details_checkbox"><label for="show_details_checkbox"> Show detail columns</label>
 
-    <table>
+    <table class="bordered_table">
         <tr>
             <th style="min-width: 15em">Username</th>
             <th style="min-width: 10em">Domain</th>