add chat send history sample

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

closes #1091

Added

• samples: Added chat send history sample, by @a-b-r-o-w-n, in PR #1678

[coveralls]

Pull Request Test Coverage Report for Build 911

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 9 unchanged lines in 2 files lost coverage.
• Overall coverage remained the same at 52.542%

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Files with Coverage Reduction	New Missed Lines	%
packages/component/src/Utils/TimeAgo.js	3	70.59%
packages/component/src/Utils/Timer.js	6	33.33%

Totals
Change from base Build 889:	0.0%
Covered Lines:	882
Relevant Lines:	1526

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💛 - Coveralls

[cwhitten]

I'm unclear why this isn't provided by the component out of the box!

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

@cwhitten one thing I can think of in opposition to adding this to the bundle is concerns over security / managing the session state. Would it be by user / conversation / bot / something else? IMO this is better suited as a custom add on that suits the customer's need. Also, while this feature is helpful for testing, I am not convinced that it is useful for the majority of bot interactions.