Fix runtime with preview dummy related to signals #28795

Job	Run time
Compile Maps	45s
Lint with OpenDream	23s
Find Maps to Test	8s
Run Linters	4m 31s
Windows Build	3m 41s
Alternate Tests	0s
Check Alternate Tests	0s
Unit Tests (bigredv2) / run_unit_tests	3m 9s
Unit Tests (corsat) / run_unit_tests	3m 4s
Unit Tests (chinook) / run_unit_tests	3m 34s
Unit Tests (almayer) / run_unit_tests	3m 5s
Unit Tests (fiorina_sciannex) / run_unit_tests	3m 3s
Unit Tests (desert_dam) / run_unit_tests	3m 18s
Unit Tests (kutjevo) / run_unit_tests	2m 58s
Unit Tests (ice_colony_v2) / run_unit_tests	3m 10s
Unit Tests (lv522_chances_claim) / run_unit_tests	2m 55s
Unit Tests (new_varadero) / run_unit_tests	3m 1s
Unit Tests (prison_station_fop) / run_unit_tests	2m 59s
Unit Tests (lv624) / run_unit_tests	3m 2s
Unit Tests (runtime) / run_unit_tests	2m 55s
Unit Tests (shivas_snowball) / run_unit_tests	3m 16s
Unit Tests (sorokyne_strata) / run_unit_tests	3m 2s
Unit Tests (whiskey_outpost_v2) / run_unit_tests	3m 11s
	59m 10s

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