Solution for the namespace issue when using BulkDeleteView and BulkEditView.

[netsinfoo]

Hello
While building a plugin I noticed that when using bulk views there was an error in the namespace. Looking for the error I verified that the netbox didn't do the reverse for the bulk view.
By examining the core code, I found the problem. In the /opt/netbox/netbox/utilities/templatetags/helpers.py file, the viewname and validated_name functions when mounting the viewname variable do not take into account that the plugins are under the plugin app. And when creating the viewname it creates this way: :action. And not plugins::action. This causes an error in the bulk template when it is used.
To use netbox facilities I changed the functions. As shown below.

After the correction, both the bulk templates and all the buttons appeared correctly, without having to create templates.