"find apps" in admin creates almost duplicate app in django_plotly_dash_statelessapp

[sdementen]

I have created the example app SimpleExample.

When running the django project for the first time, the table django_plotly_dash_statelessapp is empty.

When I first run the Dash app, the table contains a new row with name="SimpleExample" and slug="simpleexample".
However, when I run the "find apps" command in the admin panel, I get a second app with name="simpleexample" and slug="simpleexample2". This is due to the name = slugify(name) found https://github.com/GibbsConsulting/django-plotly-dash/blob/master/django_plotly_dash/dash_wrapper.py#L105 and https://github.com/GibbsConsulting/django-plotly-dash/blob/master/django_plotly_dash/dash_wrapper.py#L123.

I guess this is not expected (there should be only one row in this table for the SimpleExample app).

As there is already the slug field for the slugified version of the app name, I suspect the two lines should be commented. If I do so, the "find apps" does not create a new row in the table.

Maybe linked to issue #263 ?

[sdementen]

@GibbsConsulting is the solution proposal a good fix ?
if so, I prepare a PR.