fix(extract) run Swing code on the EDT #73

Job	Run time
Compile templates and cache kotlinc output	3m 39s
macOS (x64)	9m 49s
FreeBSD Cross	3m 41s
macOS (arm64)	2m 53s
Linux Cross (arm32)	3m 21s
Linux (x64)	4m 6s
Linux Cross (arm64)	4m 30s
Linux Cross (ppc64le)	3m 37s
Windows (x86)	2m 36s
Linux Cross (riscv64)	3m 19s
Windows (x64)	4m 37s
Windows (arm64)	2m 29s
	48m 37s

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