Show related object popup when a selected option is clicked in ManyToMany autocomplete field

[mrts]

Hello!

Currently admin ManyToMany autocomplete fields don't allow editing selections like ForeignKey fields do.

I would like to suggest adding adding editing by showing the related object popup when a selected option is clicked in a ManyToMany autocomplete field.

Alternatively, the unicode pencil icon could be added next to the × icon into the selection chip for editing:

[ ( × 🖉 option 1 ) ( × 🖉 option 2 ) ] + 

I recently had to implement this and a (somewhat incomplete) overview how to do it with django-autocomplete-light is here:

https://stackoverflow.com/a/61580389/258772

What do you think?

Best regards,

Mart