Improvies debugability of event handlers. #376

Job	Run time
Code Coverage	26m 0s
Clippy	8m 9s
Check (windows-latest)	14m 13s
Build Example Application UIs (stocks_simulated/ui, npm install && npm run build)	17s
Check (ubuntu-latest)	7m 7s
Check (macos-latest)	5m 33s
Documentation	7m 36s
Rustfmt	23s
Test (windows-latest)	18m 38s
Test (ubuntu-latest)	9m 26s
Test (macos-latest)	7m 11s
	1h 44m 33s

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