Build

use size correctly on windows open_file_dialog implementation #312

Job	Run time
build / windows (windows-11-arm, arm64)	34s
build / linux (ubuntu-24.04-arm, arm64)	1m 24s
build / macos (macos-15-intel, x64)	44s
build / linux (ubuntu-22.04, x64)	36s
build / macos (macos-15, arm64)	22s
build / windows (windows-2022, x64)	29s
	4m 9s

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