Sometimes the dropdown does not close

[elisei-timofte]

"react-autocomplete": "^1.8.1"
"react": "^16.4.1"

There is a small bug regarding the closing of an opened dropdown, when clicking outside the input.

Steps to reproduce:

1. Focus the input
2. Fast hover one option (~100ms)
3. Now, the dropdown is not closing when clicking outside
4. Hover again the option, but longer (~500-1000ms)
5. Now, the dropdown close as expected when focusing other input, or when clicked outside the dropdown

Note: At point (3) the dropdown acts normally if I press TAB (focus the next input) or ESC (close the dropdown)

Here you can see it in action https://youtu.be/dQVJv2En-iM

At minute 0:06 is the first attempt of replicating the bug (passes - notice the name dropdown closing and the email dropdown opening)
At 0:10 is the second attempt (fails - the name dropdown does not close any more when clicking the email)