Fixes incorrect count of groups due to multi-exclusion query

Renames value_key to agg_value_key for the plot kinds where it is aggregated

Deepcopy fields prior to returning them. This allows code further down the line to modify the fields by reference without leaking global scope references.

Creates a new Django Form subclass modifying its behavior such that the initial value of fields is coalesced when the data attribute does not contain the corresponding field

Improves user experience by requesting the graphs plot only after the new form elements have been rendered, therefore including them in the plot request.

Provides a sanitized interface for selecting axis values. Changes the previously freely selected variables to ModelFieldPlotter predefined choices. Available plot kinds are determined the value types of these fields.

Return early if previous select element's value is none, when generating the dynamic plot options form.