More ban stuff: Show whether or not user has "seen" a ban yet in the ban list and on IP address pages. Purge useless expired ban records.

templates/mod/ban_list.html

@@ -10,6 +10,7 @@
 				<th>{% trans 'Set' %}</th>
 				<th>{% trans 'Duration' %}</th>
 				<th>{% trans 'Expires' %}</th>
+				<th>{% trans 'Seen' %}</th>
 				<th>{% trans 'Staff' %}</th>
 			</tr>
 			{% for ban in bans %}
@@ -58,6 +59,13 @@
 							{% endif %}
 						{% endif %}
 					</td>
+					<td>
+						{%  if ban.seen %}
+							{% trans 'Yes' %}
+						{%  else %}
+							{% trans 'No' %}
+						{%  endif %}
+					</td>
 					<td>
 						{% if ban.username %}
 							{% if mod|hasPermission(config.mod.view_banstaff) %}

templates/mod/view_ip.html

@@ -136,6 +136,16 @@
 							{% endif %}
 						</td>
 					</tr>
+					<tr>
+						<th>{% trans 'Seen' %}</th>
+						<td>
+							{%  if ban.seen %}
+								{% trans 'Yes' %}
+							{%  else %}
+								{% trans 'No' %}
+							{%  endif %}
+						</td>
+					</tr>
 					<tr>
 						<th>{% trans 'Staff' %}</th>
 						<td>