Closes #11294: Markdown Preview (#11894)

* MarkdownWidget

* Change border and color of active markdown tab

* Fix template name typo

* Add render markdown endpoint

* Static assets for markdown widget

* widget style fix and unique ids based on name

* Replace SmallTextArea with SmallMarkdownWidget

* Clear innerHTML before swapping

* render markdown directly in template

* change render markdown view path

* remove small markdown widget

* Simplify rendering logic

* Use a form to clean input Markdown data

---------

Co-authored-by: Jeremy Stretch <jstretch@ns1.com>

netbox/tenancy/forms/bulk_edit.py

@@ -2,7 +2,7 @@ from django import forms
 
 from netbox.forms import NetBoxModelBulkEditForm
 from tenancy.models import *
-from utilities.forms import CommentField, DynamicModelChoiceField, SmallTextarea
+from utilities.forms import CommentField, DynamicModelChoiceField
 
 __all__ = (
     'ContactBulkEditForm',
@@ -106,7 +106,6 @@ class ContactBulkEditForm(NetBoxModelBulkEditForm):
         required=False
     )
     comments = CommentField(
-        widget=SmallTextarea,
         label='Comments'
     )