fix: some Django antipatterns

[jrief]

Description

This PR does not change any functionality!

It just fixes two anti-patterns in django-CMS:

force_str(_("…some text…")) is completely useless because it forces to stringify a proxy object. A better and faster way is to use gettext("…some text…") directly.

HttpResponse(json.dumps(content), content_type="application/json") probably is a legacy statement. Django introduced JsonResponse many versions ago.

Related resources

We discussed about this during one of our biweekly meetings.

Checklist

• I have opened this pull request against develop-4
• I have added or modified the tests when changing logic
• I have followed the conventional commits guidelines to add meaningful information into the changelog
• I have read the contribution guidelines and I have joined #workgroup-pr-review on Slack to find a “pr review buddy” who is going to review my pull request.

I ran all unit tests successfully on my local environment.

[jrief]

why am I considered as a new contributor and why this notification then fails?

[fsbraun]

@jrief I appreciate the initiative! IHMO in the admin files all gettext_lazy can be replaced by gettext, since all of them appear in a request response cycle.

The only question I have: Why does pageadmin need to import IntegrityError?

[jrief]

The only question I have: Why does pageadmin need to import IntegrityError?

ups...

some remaining from my private branch

[marksweb]

Adding my approval to this as I'm passing, pending that bit of cleanup.