Dev230321 to main

Dear Philip,

I was looking at the concluding step of MDE-THREDDS when I realized I hadn't Merge requested the most recent developments.

What are your thoughts on upgrading the repository to the most recent version of Django-template? Then, we can add reuse to JS codes and others such as select2 that I modified it to take advantage of JS-search to the FilePathField. If feasible Please take a look and review them. Thanks