Fix replace field focus losing when Notepad++ is switched back #12

Job	Run time
before_build	57s
build_windows_cmake (Release, x64, amd64)	4m 40s
build_windows_msys2 (Release, x86_64)	5m 37s
build_windows (Release, x64)	3m 58s
build_windows_msys2 (Release, i686)	4m 56s
build_windows (Release, Win32)	3m 57s
build_windows_msys2 (Debug, x86_64)	4m 52s
build_windows (Release, ARM64)	4m 37s
build_windows_msys2 (Debug, i686)	4m 5s
build_windows (Debug, x64)	6m 17s
build_windows (Debug, Win32)	4m 40s
build_windows (Debug, ARM64)	3m 37s
	52m 13s

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