Add ability to sort by fields

Some fields are already indexed by our database, so this is mostly a UI feature.

### Discussed in https://github.com/dropzone/dropzone-plus-support/discussions/12

<div type='discussions-op-text'>

<sup>Originally posted by **enyo** September  7, 2021</sup>
In the "data" section of the dashboard, it should be possible to click a title so the data gets sorted by it.</div>