[4.3] Unify `CanvasItemEditor` duplicate hovering behavior #675

Job	Run time
📊 Static checks / Code style, file formatting, and docs	24s
🍎 macOS / Editor (target=editor, tests=yes)	4m 44s
🍎 macOS / Template (target=template_release)	2m 48s
🍏 iOS / Template (target=template_release)	1m 47s
🌐 Web / Template w/ threads (target=template_release, threads=yes)	6m 14s
🐧 Linux / Editor w/ Mono (target=editor)	3m 18s
🌐 Web / Template w/o threads (target=template_release, threads=no)	6m 32s
🐧 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)	18m 6s
🤖 Android / Editor (target=editor)	3m 59s
🐧 Linux / Editor with clang sanitizers (target=editor, tests=yes, dev_build=yes, use_asan=yes, use_ubsan=yes, use_llvm=yes, linker=lld)	6m 1s
🤖 Android / Template arm32 (target=template_release, arch=arm32)	3m 40s
🐧 Linux / Editor with ThreadSanitizer (target=editor, tests=yes, dev_build=yes, use_tsan=yes, use_llvm=yes, linker=lld)	7m 1s
🏁 Windows / Editor (target=editor, tests=yes)	10m 50s
🤖 Android / Template arm64 (target=template_release, arch=arm64)	3m 17s
🐧 Linux / Template w/ Mono (target=template_release)	1m 2s
🏁 Windows / Template (target=template_release)	8m 28s
🐧 Linux / Minimal template (target=template_release, everything disabled)	55s
🪲 Godot CPP / Build and test Godot CPP	7m 55s
	1h 37m 1s

Provide feedback