Select input fixes

[nmonterroso]

@Wikia/lore
fixes some issues with the Select input after using it in the taxonomy-front-end:

• background color for the wrapper did not match that of the actual select component
• custom class was being applied to the react-select component, not the wrapper
• onBlur was not being called with up-to-date values since they are not immediately available. To avoid this I'm manually firing onBlur after onChange and preventing the default onBlur behavior if it followed an onChange.

[coveralls]

Pull Request Test Coverage Report for Build 530

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 100.0%

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Totals
Change from base Build 529:	0.0%
Covered Lines:	350
Relevant Lines:	350

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💛 - Coveralls