fix erroneous mouse motion when alt-tabbing in CS2 #2557

Job	Run time
Create test plan	6s
level1 / Haiku	5m 23s
level2 / Windows (msys2, mingw32)	8m 7s
level2 / Windows (MSVC, x64)	5m 13s
level2 / Windows (msys2, clang32)	6m 50s
level2 / Sony PlayStation Vita (GLES w/ PVR_PSP2)	3m 14s
level2 / Emscripten	8m 41s
level2 / Sony PlayStation Portable	3m 47s
level2 / Android (CMake, lean)	3m 12s
level2 / Windows (MSVC, x86)	4m 3s
level2 / Windows (msys2, clang64)	5m 43s
level2 / LoongArch64	2m 47s
level2 / Android (Android.mk)	1m 24s
level2 / Windows (msys2, ucrt64)	8m 17s
level2 / Windows (msys2, mingw64)	7m 57s
level2 / Ubuntu 20.04	4m 13s
level2 / PowerPC	1m 57s
level2 / NetBSD	2m 38s
level2 / iOS (CMake & xcode)	2m 7s
level2 / Ubuntu 22.04	4m 46s
level2 / tvOS (CMake & xcode)	2m 42s
level2 / Android (Gradle)	2m 21s
level2 / Windows (MSVC, ARM)	3m 25s
level2 / PowerPC64	1m 54s
level2 / MacOS (GNU prefix)	3m 50s
level2 / Windows (MSVC, clang-cl x86)	3m 59s
level2 / Windows (MSVC, ARM64)	4m 8s
level2 / Sony PlayStation Vita (GLES w/ pib)	3m 14s
level2 / RISC OS	1m 21s
level2 / Ubuntu 20.04 (Intel oneAPI)	6m 45s
level2 / Steam Linux Runtime (Sniper)	3m 15s
level2 / Sony PlayStation 2	4m 54s
level2 / Windows (MSVC, clang-cl x64)	5m 5s
level2 / FreeBSD	2m 49s
level2 / MacOS (Framework) (x64)	4m 35s
level2 / GDK (MSVC, x64)	2m 35s
level2 / Nintendo 3DS	2m 0s
level2 / MacOS (Framework) (arm64)	2m 20s
level2 / Android (CMake)	2m 53s
level2 / Ubuntu 20.04 (Intel Compiler)	4m 37s
	2h 39m 7s

Provide feedback