Simplify intefaces and add a few more bits about the abort flag in th… #146

Job	Run time
build (Blazor.SourceGenerators)	17s
build (Blazor.Serialization)	18s
build (Blazor.LocalStorage.WebAssembly)	20s
build (Blazor.LocalStorage)	22s
build (Blazor.SessionStorage.WebAssembly)	22s
build (Blazor.SessionStorage)	18s
build (Blazor.Geolocation.WebAssembly)	23s
build (Blazor.Geolocation)	22s
build (Blazor.SpeechSynthesis.WebAssembly)	20s
build (Blazor.SpeechSynthesis)	21s
build (Blazor.SpeechRecognition.WebAssembly)	20s
build (Blazor.SpeechRecognition)	21s
test	1m 48s
	5m 52s

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