Added buttons and filtering of available IP Addresses and child prefixes in prefix view

- Add 2 new buttons, Hide available and Show available to Prefix view.
 - Add in logic into the prefix view to only include IP Addresses if we want to show available addresses
 - This changes the default mode to NOT show available IPAddresses in the prefix view.

netbox/ipam/views.py

@@ -504,6 +504,7 @@ class PrefixPrefixesView(View):
         ).annotate_depth(limit=0)
 
         # Annotate available prefixes
+        if request.GET.get('show_available', None):
             if child_prefixes:
                 child_prefixes = add_available_prefixes(prefix.prefix, child_prefixes)
 
@@ -544,6 +545,7 @@ class PrefixIPAddressesView(View):
         ipaddresses = prefix.get_child_ips().select_related(
             'vrf', 'interface__device', 'primary_ip4_for', 'primary_ip6_for'
         )
+        if request.GET.get('show_available', None):
             ipaddresses = add_available_ipaddresses(prefix.prefix, ipaddresses, prefix.is_pool)
 
         ip_table = tables.IPAddressTable(ipaddresses)

netbox/templates/ipam/prefix.html

@@ -52,6 +52,12 @@
     </div>
     <h1>{% block title %}{{ prefix }}{% endblock %}</h1>
     {% include 'inc/created_updated.html' with obj=prefix %}
+    <div class="pull-right">
+        <div class="btn-group" role="group">
+            <a href="{{ request.path }}{% querystring request show_available=None %}" class="btn btn-default{% if not request.GET.show_available %} active{% endif %}">Hide available</a>
+            <a href="{{ request.path }}{% querystring request show_available='on' %}" class="btn btn-default{% if request.GET.show_available %} active{% endif %}">Show available</a>
+        </div>
+    </div>
     <ul class="nav nav-tabs" style="margin-bottom: 20px">
         <li role="presentation"{% if not active_tab %} class="active"{% endif %}>
             <a href="{% url 'ipam:prefix' pk=prefix.pk %}">Prefix</a>