Advanced NFS entry does not allow comments.

[phillxnet]

When attempting to enter an Advanced NFS Export via: Storage -> NFS -> Advanced Edit (button):

Enter manual export entries below.

and enter a configuration starting with a comment # comment, we are greeted with the following:

Share with name (#) does not exist.

            Traceback (most recent call last):
  File "/opt/rockstor/src/rockstor/storageadmin/views/share_helpers.py", line 58, in validate_share
    return Share.objects.get(name=sname)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/rockstor/.venv/lib/python3.11/site-packages/django/db/models/manager.py", line 87, in manager_method
    return getattr(self.get_queryset(), name)(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/rockstor/.venv/lib/python3.11/site-packages/django/db/models/query.py", line 637, in get
    raise self.model.DoesNotExist(
storageadmin.models.share.Share.DoesNotExist: Share matching query does not exist.

It would be preferred, in an advanced entry, that we allow comments to be included.