MR More Actions dropdown stays open behind emoji picker

Summary

both dropdowns are expanded

Steps to reproduce

on an MR open More Actions dropdown then click Emoji dropdown

What is the expected correct behavior?

More Actions dropdown should be closed

Relevant logs and/or screenshots

Screen_Shot_2017-06-10_at_12.23.01_am_copy

Possible fixes

(If you can, link to the line of code that might be responsible for the problem)