Add more context to some `Window` errors #12387

Job	Run time
📊 Static checks / Code style, file formatting, and docs	38s
🤖 Android / Template (target=template_release)	5m 2s
🍎 macOS / Editor (target=editor, tests=yes)	4m 23s
🍏 iOS / Template (target=template_release)	3m 9s
🐧 Linux / Editor w/ Mono (target=editor)	4m 54s
🍎 macOS / Template (target=template_release)	3m 24s
🐧 Linux / Editor with doubles and GCC sanitizers (target=editor, tests=yes, dev_build=yes, scu_build=yes, precision=double, use_asan=yes, use_ubsan=yes, linker=gold)	17m 7s
🌐 Web / Template (target=template_release)	1m 22s
🐧 Linux / Editor with clang sanitizers (target=editor, tests=yes, dev_build=yes, use_asan=yes, use_ubsan=yes, use_llvm=yes, linker=lld)	9m 22s
🏁 Windows / Editor (target=editor, tests=yes)	10m 1s
🏁 Windows / Template (target=template_release)	8m 34s
🐧 Linux / Editor with ThreadSanitizer (target=editor, tests=yes, dev_build=yes, use_tsan=yes, use_llvm=yes, linker=lld)	9m 55s
🐧 Linux / Template w/ Mono (target=template_release)	1m 17s
🐧 Linux / Minimal template (target=template_release, everything disabled)	2m 15s
🪲 Godot CPP / Build and test Godot CPP	11m 37s
	1h 33m 0s

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