Bring back zones in `gui/blueprint` (WIP) #10101

Job	Run time
check-pr	1s
lint / lint	21s
docs / Build linux64	1m 25s
package / Linux / Build linux64	1m 30s
package / Windows / Build win64	5m 8s
test / Windows MSVC / Build win64	4m 23s
test / Linux gcc-10 / Build linux64	1m 26s
test / Linux gcc-12 / Build linux64	1m 42s
test / Run Linux test suite (gcc-12, all plugins)	0s
test / Run Linux test suite	0s
test / Run Windows test suite	0s
test / Run Windows test suite (empty config)	0s
	15m 56s

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