Fixed background not expanding for top level objects #46

Job	Run time
Check	2m 29s
Check wasm32	1m 10s
Clippy	2m 9s
build (macos-latest, aarch64-apple-darwin)	1m 27s
Rustfmt	32s
build (macos-latest, x86_64-apple-darwin)	1m 26s
Test Suite	7m 56s
build (ubuntu-latest, x86_64-unknown-linux-gnu)	6m 8s
trunk	3m 0s
build (windows-latest, x86_64-pc-windows-msvc, .exe)	6m 31s
	32m 48s

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