Implement account creation; add base class FormData to validate forms

templates/account_edit.html.twig

@@ -16,21 +16,11 @@
     <h3>Edit account data</h3>
 
     <form action="/accounts/{{ id }}/edit" method="POST">
-        {% if success is defined %}
-            <div class="success_box">
-                <h4>Success</h4>
-                {{ success }}
-            </div>
-        {% elseif error is defined %}
-        <div class="error_box">
-            <h4>Error</h4>
-            {{ error }}
-        </div>
-        {% endif %}
+        {{ include('includes/form_result_box.html.twig') }}
 
         <input type="hidden" name="user_id" value="{{ id }}"/>
 
-        <div class="edit_box">
+        <div class="form_box">
             <h4>Username</h4>
             <table>
                 <tr>
@@ -60,7 +50,7 @@
             </table>
         </div>
 
-        <div class="edit_box">
+        <div class="form_box">
             <h4>Password</h4>
             <p>The new password will be hashed using the current default hash algorithm.</p>
             <table>
@@ -75,7 +65,7 @@
             </table>
         </div>
 
-        <div class="edit_box">
+        <div class="form_box">
             <h4>Account status</h4>
             <table>
                 <tr>
@@ -99,7 +89,7 @@
             </table>
         </div>
 
-        <div class="edit_box">
+        <div class="form_box">
             <h4>Home directory</h4>
             <p><b>Important:</b> Changing the home directory here will <b>NOT</b> move any existing mail data, this needs to be done
                 manually!</p>
@@ -117,7 +107,7 @@
             </table>
         </div>
 
-        <div class="edit_box">
+        <div class="form_box">
             <h4><label for="edit_memo">Admin memo</label></h4>
             <p>This field is only readable by admins.</p>
             <table>