[dashboard] Auto-sort data by latest updates/imports

[ao508]

This is different from #1152 which makes all of the columns sortable. The reason why the columns aren't auto-sortable is due to many of the data elements being nested properties of the main data source.

The changes from this task would at least always show the latest records updated/imported at the top.

Field to import by for each page:

• patients: not needed
• requests: importDate (surface this field as well)

[ao508]

Please add your planning poker estimate with Zenhub @qu8n