[Web][Postfix][Dovecot] Mail policies: compare addresses like Postfix, close bypasses via alias forms, temporary aliases, Sieve and cross-domain groups

data/web/templates/edit/mail-policy-fields.twig

@@ -1,5 +1,6 @@
 {# Fields of a mail policy (add modal, edit page): policy, id (prefix of the element ids), groups (choices: id, name,
-   domain, address), mailboxes (choices), ro, label_class. Groups of a list are sent apart as <list>_groups. #}
+   domain, address), mailboxes (choices), ro, label_class. Groups of a list are sent apart as <list>_groups; without
+   group choices (none in the domain, no access to groups) the group fields are left out and stay unchanged. #}
 {% set entries = {} %}
 {% set listed = {} %}
 {% for key in ['send_allow', 'send_block', 'receive_allow', 'receive_block'] %}
@@ -35,13 +36,15 @@
   <label class="control-label col-sm-2{{ label_class }}" for="{{ id }}_{{ key }}">{{ attribute(lang.mail_policy, list ~ '_' ~ side) }}</label>
   <div class="col-sm-10">
     <textarea class="form-control" rows="3" name="{{ key }}" id="{{ id }}_{{ key }}" placeholder="partner.example, user@example.org"{% if ro %} disabled{% endif %}>{{ attribute(entries, key) }}</textarea>
-    <small class="text-muted d-block mb-1">{{ lang.mail_policy.entries_info }}</small>
+    <small class="text-muted d-block mb-1">{{ attribute(lang.mail_policy, 'entries_info_' ~ side) }}</small>
+    {% if groups %}
     {% if not ro %}<input type="hidden" name="{{ key }}_groups" value="">{% endif %}
     <select data-live-search="true" data-width="100%" name="{{ key }}_groups" class="form-control mail-policy-groups" multiple title="{{ lang.mail_policy.groups }}"{% if ro %} disabled{% endif %}>
       {% for group in groups %}
       <option value="{{ group.id }}" data-domain="{{ group.domain }}"{% if group.id ~ '' in attribute(listed, key) %} selected{% endif %}>{{ group.name }}{% if group.address %} ({{ group.address }}){% endif %}</option>
       {% endfor %}
     </select>
+    {% endif %}
   </div>
 </div>
 {% endfor %}
@@ -66,6 +69,7 @@
     </select>
   </div>
 </div>
+{% if groups %}
 <div class="row mb-2">
   <label class="control-label col-sm-2{{ label_class }}" for="{{ id }}_groups">{{ lang.mail_policy.groups }}</label>
   <div class="col-sm-10">
@@ -77,3 +81,4 @@
     </select>
   </div>
 </div>
+{% endif %}