Improve object list layout (#6907)

* Split object list and filters into tabs

* Use object_list template for connections, rack elevations

* Include custom field filters in grouped filter form

* Annotate number of applied filters on tab

* Rearrange table controls

netbox/extras/forms.py

@@ -519,12 +519,14 @@ class CustomFieldModelFilterForm(forms.Form):
         super().__init__(*args, **kwargs)
 
         # Add all applicable CustomFields to the form
+        self.custom_field_filters = []
         custom_fields = CustomField.objects.filter(content_types=self.obj_type).exclude(
             filter_logic=CustomFieldFilterLogicChoices.FILTER_DISABLED
         )
         for cf in custom_fields:
             field_name = 'cf_{}'.format(cf.name)
             self.fields[field_name] = cf.to_form_field(set_initial=True, enforce_required=False)
+            self.custom_field_filters.append(field_name)
 
 
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