[chores] Improvements to IpAddressAdmin

- show organization field first
- rename the org filter to IpOrganizationFiltger
  to make it clear that it's the organization filter for Ip
- added title attribute to subnet filter

openwisp_ipam/admin.py

@@ -22,7 +22,7 @@
 from .api.views import HostsSet
 from .base.forms import IpAddressImportForm
 from .base.models import CsvImportException
-from .filters import SubnetFilter, SubnetOrganizationFilter
+from .filters import IpOrganizationFilter, SubnetFilter
 
 Subnet = swapper.load_model('openwisp_ipam', 'Subnet')
 IpAddress = swapper.load_model('openwisp_ipam', 'IpAddress')
@@ -219,7 +219,7 @@ class IpAddressAdmin(
     form = IpAddressAdminForm
     change_form_template = 'admin/openwisp-ipam/ip_address/change_form.html'
     list_display = ['ip_address', 'subnet', 'organization', 'created', 'modified']
-    list_filter = [SubnetFilter, SubnetOrganizationFilter]
+    list_filter = [IpOrganizationFilter, SubnetFilter]
     search_fields = ['ip_address']
     autocomplete_fields = ['subnet']
     multitenant_parent = 'subnet'

openwisp_ipam/filters.py

@@ -1,3 +1,4 @@
+from django.utils.translation import gettext_lazy as _
 from openwisp_users.multitenancy import MultitenantRelatedOrgFilter
 from swapper import load_model
 
@@ -7,8 +8,9 @@
 class SubnetFilter(MultitenantRelatedOrgFilter):
     field_name = 'subnet'
     parameter_name = 'subnet_id'
+    title = _('subnet')
 
 
-class SubnetOrganizationFilter(MultitenantRelatedOrgFilter):
+class IpOrganizationFilter(MultitenantRelatedOrgFilter):
     parameter_name = 'subnet__organization'
     rel_model = Subnet