Fix TGUI choice dialog not respecting the default option #48199

Job	Run time
Compile All Maps	1m 16s
Lints	1m 57s
Find Maps to Test	13s
Lint with OpenDream	36s
Compile and Run Tests (icemeta)	7m 47s
Compile and Run Tests (gaxstation)	4m 39s
Compile and Run Tests (donutstation)	5m 45s
Compile and Run Tests (manateestation)	5m 56s
Compile and Run Tests (ministation)	4m 53s
Compile and Run Tests (multiz_debug)	4m 31s
Compile and Run Tests (runtimestation)	4m 13s
Compile and Run Tests (yogstation)	6m 3s
Final Map Test	1s
	47m 50s

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