Add button to quickly include all form variables in JSON dump plugin #15506

Job	Run time
Set up docker build 'dynamic' env variables	1s
Build and check documentation	1m 19s
End-to-end tests, chromium	13m 42s
End-to-end tests, firefox	17m 40s
Run the Django test suite	7m 53s
End-to-end tests, webkit	13m 54s
Run the Django test suite in reverse	6m 16s
docker_build (extensions, token_exchange,prefill_haalcentraalhr, all-extensions-) / Build image	2m 52s
docker_build (production) / Build image	2m 45s
Scan docker image	2m 35s
Simulate upgrading instances (3.0.1)	1m 21s
Check for unexepected OAS changes	7s
Validate OAS	13s
Generate Postman collection from OAS	11s
Generate SDKs from OAS	31s
Push Docker image	0s
update-docker-readme	0s
	1h 11m 20s

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