Access to global constants and removing chooser col filtering #1084

Job	Run time
linux-64-py	5m 54s
Standard 2-Zone Example (SANDAG)	35m 20s
Estimation Mode Unit Tests	23m 20s
Estimation Notebooks Test	49m 27s
estimation_edb_creation_test	7m 17s
random_seed_generation_test	3m 20s
Standard 1-Zone Example (MTC)	22m 41s
macOS	5m 4s
win-64	8m 31s
Expression Profiling Tests	7m 39s
prototype_mtc	54m 35s
prototype_marin	1m 55s
prototype_sandag_xborder	5m 41s
prototype_mtc_extended	41m 56s
production_semcog	6m 39s
placeholder_psrc	57m 6s
placeholder_multiple_zone	9m 48s
prototype_mwcog	57m 58s
develop-docbuild	-1s
	6h 44m 10s

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