🐛 Issues with django admin inline

[sahilasopa]

Bug Description

There has been this long and everlasting problem of using Django admin inline with a select2 widget, hours of browsing through stack-overflow and Github issues led me to nowhere.

The bug is:
Select2 Dropdown does not work when you add new inlines (works perfectly for existing inlines), I specifically faced this bug in Django admin

Steps to Reproduce

1. Use a select2 widget on Django admin (link the admin via model form)
   the widget I used was HeavySelect2Widget
2. click on add inline
3. try to click on the dropdown widget and see NOTHING HAPPEN

Expected Behavior

It's expected to see a dropdown

[sahilasopa]

the issue has been mentioned in #249 too

[mardukbp]

@sahilasopa I just submitted a PR that fixes this issue using the solution from #249 plus a small contribution of mine. Hopefully it will be merged soon. In the meantime you can try it yourself using the standard Django mechanism for overriding static files or templates.