Fix drag and drop serialization #10567

Job	Run time
Test Suite with Optimizations	2m 28s
Check MSRV	2m 28s
Test Suite	2m 29s
Rustfmt	36s
Test Docs	2m 28s
Docs	1m 59s
nix (macos-latest)	2m 23s
Check	2m 26s
nix (blacksmith-4vcpu-ubuntu-2404)	2m 28s
Clippy	2m 26s
matrix_test (aarch64-apple-darwin, macos-latest, 1.88.0, false, test, --all --tests, desktop)	1s
Playwright Tests (beta)	1m 48s
cargo test \| windows	2m 23s
matrix_test (aarch64-unknown-linux-gnu, ubuntu-24.04-arm, 1.88.0, false, build, --all --tests, de...	1m 26s
matrix_test (aarch64-apple-ios, macos-latest, 1.88.0, false, build, --package dioxus-desktop, ios)	1m 26s
matrix_test (aarch64-linux-android, blacksmith-4vcpu-ubuntu-2404, 1.88.0, true, build, --package ...	1m 34s
	30m 49s

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