JSONField loses styling if custom `help_text` is passed

[jeremystretch]

Deployment Type

Self-hosted

NetBox Version

v4.2.6

Python Version

3.10

Steps to Reproduce

1. Open the form to create a custom field
2. Select "object" for the type of field
3. Enter something in the "related object filter field"

Expected Behavior

The form field should use a monospace text to preserve formatting.

Observed Behavior

The form field uses regular text. This is due to a bug in the field's init method, which applies the font-monospace CSS class only if the default help_text is used:

netbox/netbox/utilities/forms/fields/fields.py

Lines 98 to 103 in e1e5142

	def __init__(self, *args, **kwargs):
	super().__init__(*args, **kwargs)
	if not self.help_text:
	self.help_text = _('Enter context data in <a href="https://json.org/">JSON</a> format.')
	self.widget.attrs['placeholder'] = ''
	self.widget.attrs['class'] = 'font-monospace'