Clicking on Material Select triggers a ClickAwayListener.

[seonkyu94]

• The issue is present in the latest release.
• I have searched the issues of this repository and believe that this is not a duplicate.

Current Behavior 😯

Hi, I hope you guys are doing well.

I tried to use ClickAwayListener with Select.
Demo code here https://codesandbox.io/s/material-demo-t3y67?fontsize=14&hidenavigation=1&theme=dark
If you click open menu button, then click Select in the Paper that appears will trigger the ClickAwayListener.

Expected Behavior 🤔

I think it should not trigger ClickAwayListener when I click Select, because Select is descendant of ClickAwayListener.

Steps to Reproduce 🕹

Steps:

1. Go to : https://codesandbox.io/s/material-demo-t3y67?fontsize=14&hidenavigation=1&theme=dark
2. Click open menu button.
3. You must see Paper with Select.
4. Click Select.
5. Step 4 triggers ClickAwayListener.

Your Environment 🌎

Tech	Version
Material-UI	v4.7.2
React	v16.10.2
Browser	Chrome

[oliviertassinari]

Duplicate of #18586