Fixed bug where selecting the first emoji search result with the ENTER KEY ignores skin tone selection

[dwijesingheWR]

Fixed bug where selecting the first emoji search result with the ENTER key ignores skin-tone selection. This bug was due to the fact that the emojis in a Category are rendered as NimbleEmoji, where skin-tone data and other properties are populated via getSanitizedData (this data is not present in the Category's emoji). Clicking an emoji therefore worked as expected since the click triggered the NimbleEmoji's handleClick function which called getSanitizedData. Pressing the enter key, however, triggered the NimblePicker's handleKeyDown function which simply returned the first emoji in SEARCH_CATEGORY (thus lacking the skin-tone data). Imported getSanitizedData from utils and called it in handleKeyDown to resolve the issue. Please let me know if you would like any more information or if changes are required to match coding style.

[nolanlawson]

Confirmed via manual testing that this fixes the issue. Thanks!