Fixed #1196 - post to new conversation does not work

[justinwilaby]

This PR fixes #1196 by resolving 500s received when posting to /v3/conversations and by opening a new live chat window upon successfully posting.

[coveralls]

Pull Request Test Coverage Report for Build 1733

• 81 of 99 (81.82%) changed or added relevant lines in 4 files are covered.
• 13 unchanged lines in 3 files lost coverage.
• Overall coverage increased (+1.9%) to 61.097%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
packages/app/main/src/restServer.ts	32	35	91.43%
packages/emulator/core/src/conversations/middleware/createConversation.ts	21	24	87.5%
packages/app/main/src/ngrokService.ts	18	22	81.82%
packages/emulator/core/src/conversations/middleware/errorCondition/createConversationValidator.ts	10	18	55.56%

Files with Coverage Reduction	New Missed Lines	%
packages/emulator/core/src/utils/createResponse/error.ts	1	0.0%
packages/emulator/core/src/utils/sendErrorResponse.ts	1	81.82%
packages/emulator/core/lib/conversations/middleware/createConversation.js	11	20.93%

Totals
Change from base Build 1727:	1.9%
Covered Lines:	5334
Relevant Lines:	7822

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💛 - Coveralls

[a-b-r-o-w-n]

Just a few minor changes requested to improve readability.

[tonyanziano]

I agree with Andy's suggested changes on readability, but other than that it looks good to me. 👍

[cwhitten]

LGTM - can you please squash your commits using the "Squash and Merge" option? You should be able to select it.