hiro: fix double character inputs in Windows HexEdit widget PR run #6

Job	Run time
Build / ares-windows-x64	6m 54s
Build / ares-windows-x64-gcc	14m 10s
Build / ares-windows-clang-cl-x64	8m 49s
Build / ares-windows-clang-cl-arm64	11m 34s
Build / ares-windows-msvc-x64	6m 19s
Build / ares-windows-msvc-arm64	7m 34s
Build / ares-macos-universal	7m 34s
Build / ares-ubuntu	8m 2s
	1h 10m 56s

Provide feedback