cherry pick of 4.4 changes into master

[johnataylor]

#2005 #2010 and #1979 into master

[tomlm]

[coveralls]

Pull Request Test Coverage Report for Build 64227

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 21 unchanged lines in 3 files lost coverage.
• Overall coverage decreased (-0.09%) to 71.053%

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Files with Coverage Reduction	New Missed Lines	%
/libraries/integration/Microsoft.Bot.Builder.Integration.AspNet.Core/BotFrameworkHttpAdapter.cs	1	69.44%
/libraries/integration/Microsoft.Bot.Builder.Integration.ApplicationInsights.Core/TelemetryBotIdInitializer.cs	1	88.0%
/libraries/Microsoft.Bot.Builder.Dialogs/Prompts/OAuthPrompt.cs	19	53.88%

Totals
Change from base Build 64181:	-0.09%
Covered Lines:	4352
Relevant Lines:	6125

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💛 - Coveralls

[fuselabs]

✔️ No Binary Compatibility issues for Microsoft.Bot.Builder.dll
✔️ No Binary Compatibility issues for Microsoft.Bot.Builder.AI.Luis.dll
✔️ No Binary Compatibility issues for Microsoft.Bot.Builder.AI.QnA.dll
✔️ No Binary Compatibility issues for Microsoft.Bot.Builder.ApplicationInsights.dll
✔️ No Binary Compatibility issues for Microsoft.Bot.Builder.Azure.dll
✔️ No Binary Compatibility issues for Microsoft.Bot.Builder.Dialogs.dll
✔️ No Binary Compatibility issues for Microsoft.Bot.Builder.TemplateManager.dll
✔️ No Binary Compatibility issues for Microsoft.Bot.Configuration.dll
✔️ No Binary Compatibility issues for Microsoft.Bot.Connector.dll
✔️ No Binary Compatibility issues for Microsoft.Bot.Schema.dll