Fixing ImGUi keybindings screen processing keys pressed before it was shown #86020

Job	Run time
matrix-variables	1s
skip-duplicates-code	5s
skip-duplicates-data	5s
Basic Build and Test (Clang 10, Ubuntu, Curses)	19m 10s
Clang 14, macOS 12, Tiles, Sound, x64 and arm64 Universal Binary	26m 38s
GCC 9, Curses, LTO	22m 54s
Clang 12, Ubuntu, Tiles, ASan	1h 26m 20s
GCC 11, Ubuntu, Curses, ASan	1s
GCC 12, Ubuntu cross-compile to MinGW-Win64, Tiles, Sound	1s
GCC 9, Ubuntu, Tiles, Sound, CMake	1s
	2h 35m 16s

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