Javascript Dynamic Picklist Proof of Concept

HIDDEN
This form is linked from a GitHub repo demonstrating how to use this dynamic picklist trick. Do not connect to production and do not delete.
Proof of Concept
This form is a simple proof of concept that a repeatable section could be used to fill a picklist, creating a "dynamic picklist."
Upon form load, it fills a repeating section with the names of all Accounts in the connected Salesforce sandbox. Then the custom javascript uses those to fill a picklist's choice values.

(There is also a line in the javascript to require that javascript be enabled.)

tfa_2 - Repeatable Section - Accounts