Add return URL to available IPs table link

As with other buttons to create objects, the 'x IPs available' button
in tables now returns to this URL after the IP address has been created.

Author: alehaa

netbox/ipam/tables/ip.py

@@ -51,7 +51,7 @@
 {% if record.pk %}
     <a href="{{ record.get_absolute_url }}" id="ipaddress_{{ record.pk }}">{{ record.address }}</a>
 {% elif perms.ipam.add_ipaddress %}
-    <a href="{% url 'ipam:ipaddress_add' %}?address={{ record.1 }}{% if object.vrf %}&vrf={{ object.vrf.pk }}{% endif %}{% if object.tenant %}&tenant={{ object.tenant.pk }}{% endif %}" class="btn btn-sm btn-success">{% if record.0 <= 65536 %}{{ record.0 }}{% else %}Many{% endif %} IP{{ record.0|pluralize }} available</a>
+    <a href="{% url 'ipam:ipaddress_add' %}?address={{ record.1 }}{% if object.vrf %}&vrf={{ object.vrf.pk }}{% endif %}{% if object.tenant %}&tenant={{ object.tenant.pk }}{% endif %}&return_url={% url 'ipam:prefix_ipaddresses' pk=object.pk %}" class="btn btn-sm btn-success">{% if record.0 <= 65536 %}{{ record.0 }}{% else %}Many{% endif %} IP{{ record.0|pluralize }} available</a>
 {% else %}
     {% if record.0 <= 65536 %}{{ record.0 }}{% else %}Many{% endif %} IP{{ record.0|pluralize }} available
 {% endif %}