feat: Add Django 4.2 admin support

[fsbraun]

Django admin styles have changed. This fixes the delete-link styling and the readonly-fields styling

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (ae6ec18) 100.00% compared to head (9c7ba4b) 100.00%.

Additional details and impacted files

@@            Coverage Diff            @@
##            master      #500   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            2         2           
  Lines           33        33           
  Branches         3         3           
=========================================
  Hits            33        33           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[DmytroLitvinov]

Hi @fsbraun ,
Seems like that Pull Request can fix issue we have at our stage server when we upgraded to Django@4.2 and we have read-only fields.

I will look into details and let you know if it fixes so we can merge and release new version of djangocms-admin-style

[DmytroLitvinov]

@fsbraun , should it looks like that way?

[fsbraun]

@DmytroLitvinov IMHO it should look like a form with editable fields, but the inputs replaced by the fields' values. Would you expect something else?

[DmytroLitvinov]

For me it is fine that it looks like that way.

Also attaching how it looks for Django@4.2 without djangocms-admin-style

[fsbraun]

Yes, plain django admin style uses horizontal separation on large screens and vertical separation of label and field on small screens.

@vinitkumar OK for you, too? Can you review? 😎