Reverse dataset order

[Ariana-B]

Reverse the order datasets are displayed on the regions page, so that they appear newest-first instead of oldest-first.

I could also make the order toggle-able, similarly to the dataset-counts page.

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:books: Documentation preview :books:: https://datacube-explorer--518.org.readthedocs.build/en/518/

[codecov[bot]]

Codecov Report

Base: 86.48% // Head: 86.48% // No change to project coverage :thumbsup:

Coverage data is based on head (b25483b) compared to base (e270aed). Patch has no changes to coverable lines.

Additional details and impacted files

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[Ariana-B]

@robbibt Unfortunately I haven't had any luck making DataTables responsive, so I don't think I can make it toggleable at this time.

[robbibt]

No worries, thanks so much @Ariana-B!