Update to egui 0.28.0 (#144) #223

Job	Run time
Rustfmt	20s
Check wasm32	1m 17s
Check	2m 30s
Clippy	2m 17s
Test Suite	4m 43s
trunk	1m 43s
build (macos-latest, aarch64-apple-darwin)	1m 44s
build (macos-latest, x86_64-apple-darwin)	1m 48s
build (ubuntu-latest, arm-unknown-linux-musleabihf)	3m 49s
build (ubuntu-latest, armv7-unknown-linux-musleabihf)	3m 39s
build (ubuntu-latest, x86_64-unknown-linux-musl)	3m 38s
build (windows-latest, x86_64-pc-windows-msvc, .exe)	4m 51s
	32m 19s

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