multiple quick clicks on left border button not working properly #439

Describe the bug

Click on the left border navigation button multiple times quickly. It is not responding properly and some requests are getting ignored. This error appears only in v0.6 and v0.7

Your Example Website or App

https://rawgit.com/caplin/FlexLayout/demos/demos/v0.7/demo/index.html

Steps to Reproduce the Bug or Issue

1. Go to https://rawgit.com/caplin/FlexLayout/demos/demos/v0.7/demo/index.html
2. Click on the left border navigation button multiple times quickly as shown in the image
   
3. Some clicks are not responded and it appears to be stuck

Expected behavior

All the clicks should be responsive. Similar to what it is in https://rawgit.com/caplin/FlexLayout/demos/demos/v0.5/demo/index.html

Operating System

Windows 7

Browser Type?

Chrome

Browser Version

122.0

Screenshots or Videos

Additional context

No response