RFE: Batch ROI export

[jburel]

• For plates, have a well (row, column, e.g. A1) as a parameter in the csv
• For plates, the activities do not suggest "navigate to the plate where I just attached the csv" icon (unlike for P/Ds)
• For multi-selections (select several Datasets or several Plates or several Projects or Screens, then run the script) or single Projects and Screens with multiple Datasets and Plates respectively, the parameter missing is the originating P/D/S/P

[will-moore]

Other suggestions from #173.

Export simplified Polygon to preserve the shape but without a long list of coordinates.
See https://shapely.readthedocs.io/en/latest/manual.html#object.simplify
As used at https://docs.google.com/presentation/d/1QzKYP6sXPefBMNfY4PW4H0AMoWVbw9HeNoweLmJg17Y/edit#slide=id.g823da5adf3_0_105

And:
Might be interesting to also use that as an opportunity to allow exporting WKT (https://shapely.readthedocs.io/en/latest/manual.html#well-known-formats) so we could begin building up familiarity with that.