Chrome Version       : Version 61.0.3163.100 (Official Build) (64-bit)
URLs (if applicable) : any (not specified)
Other browsers tested: none
  Add OK or FAIL after other browsers where you have tested this issue:
     Safari: PASS/FAIL (Version)
    Firefox: PASS/FAIL (Version)
         IE: PASS/FAIL (Version)

What steps will reproduce the problem?
(1)Click the resize button on the toolbar.
(2)Resize the window's width as small as possible.

What is the expected result?
You can resize it again.

What happens instead?
You CANNOT resize it again.
Because, your mouse cursor doesn't change to a "resize cursor" when you try to resize it.

Please provide any additional information below. Attach a screenshot if
possible.
You can just resize window's size vertically and slantingly when you are on the problem.
And then, you'll be able to resize the window's width.

For graphics-related bugs, please copy/paste the contents of the about:gpu
page at the end of this report.