Defer creating new editor process in "Quit to Project List" just like in "Reload Current Project" #16770

Job	Run time
📊 Static checks / Code style, file formatting, and docs	30s
🍏 iOS / Template (target=template_release)	26m 56s
🍎 macOS / Editor (target=editor, tests=yes)	41m 5s
🍎 macOS / Template (target=template_release)	15m 16s
🤖 Android / Template (target=template_release)	27m 14s
🐧 Linux / Editor w/ Mono (target=editor)	34m 4s
🐧 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)	34m 28s
🐧 Linux / Editor with clang sanitizers (target=editor, tests=yes, dev_build=yes, use_asan=yes, use_ubsan=yes, use_llvm=yes, linker=lld)	29m 50s
🌐 Web / Template (target=template_release)	18m 4s
🐧 Linux / Editor with ThreadSanitizer (target=editor, tests=yes, dev_build=yes, use_tsan=yes, use_llvm=yes, linker=lld)	26m 30s
🐧 Linux / Template w/ Mono (target=template_release)	22m 41s
🐧 Linux / Minimal template (target=template_release, everything disabled)	14m 6s
🏁 Windows / Editor (target=editor, tests=yes)	38m 50s
🏁 Windows / Template (target=template_release)	27m 47s
🪲 Godot CPP / Build and test Godot CPP	6m 45s
	6h 4m 6s

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