Fix multi-entity drag-and-drop only adding one entity #15584

Job	Run time
paths-filter	7s
Checks / Check if running codegen would produce any changes	1m 6s
Checks / Lint markdown	21s
Checks / Rerun lints	37s
Checks / Spell Check	8s
Checks / Misc formatting	17s
Checks / markdown-paths-filter	5s
Checks / Check links	0s
C++ tests	0s
Deploy Landing Preview	0s
Minimum CLI Build / Set Config (linux-x64)	1s
Rust Checks / Test on ${{ matrix.name }}	0s
Rust Checks / Rust lints (fmt, check, clippy, tests, doc)	8m 55s
Build rerun_js / Build rerun_js	3m 15s
Build web viewer / Build web viewer	2m 47s
Python Checks / Python lints (ruff, mypy, …)	38s
Python Checks / Test Python Docs	19s
Minimum CLI Build / Build rerun-cli (ubuntu-latest-16-cores)	5m 24s
Upload Web / Upload web build to google cloud (wasm32 + wasm-bindgen)	31s
Minimum Wheel Build / Set Config (linux-x64)	2s
Minimum Wheel Build / Build Wheels (ubuntu-latest-16-cores)	1m 1s
Minimum Wheel Test	0s
	25m 34s

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