Are the following functions being added to the system in a future release

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I am wondering if there is any plan to add a modal / popup box to web forms, flex fields to the workspace, and the ability to send post requests from a form connector in any future release?

When a user initiates a process via a start form we would like to reach out to an integration (which checks for duplicate values), then return the response to the user.  Without a modal there isn't a real clean way to do this.  Additionally without a post request it's hard / impossible to send repeating elements (such as rows in a table) to the integration for processing.