fix(dropdown): fetch js error on non existing letter selections #3028
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Description
When a dropdown is open, if you type a letter to match a label in the dropdown, an error occurs:
Note that you have to type a letter to match a label in the dropdown. If there isn't an entry starting with the letter given, no error will occur.
Testcase
Broken
Console Error
https://jsfiddle.net/lubber/x25f369y/
Fixed
No error, all fine
https://jsfiddle.net/lubber/x25f369y/1/
Closes
#3027