[django 5:css] Fixed styling of device location inline

[pandafy]

Checklist

• I have read the OpenWISP Contributing Guidelines.
• I have manually tested the changes proposed in this pull request.
• I have written new test cases for new code and/or updated existing tests for changes to existing code.
• I have updated the documentation.

[nemesifier]

Isn't the problem generalized? I was wondering if we should look for a generic solution for all the headers. Are you sure we need to change only this one?

[pandafy]

Myabe, we can generalize this using the following rule

.inline-related fieldset.module h4 {
  font-size: 16px;
  text-transform: uppercase;
  padding: 15px;
}

But, this will make heading of all fieldsets bigger.

[pandafy]

I don't see a side-effect of this now in openwisp-monitoring.

[coveralls]

coverage: 98.855%. remained the same
when pulling 4471c35 on fix-django-styling
into 751e9b2 on master.

[nemesifier]

Even with these adjustments it doesn't look as before.

New (Firmware Build):

Old (Firmware Build):

Old (device page):

Moreover, are we sure we shouldn't add the generic solution to openwisp-utils?

[pandafy]

Superseded by openwisp/openwisp-utils#470 and openwisp/django-loci#174