"No color" disappear or not present #999

Describe the bug
If you using Google chrome to write page,
the "No color" disappear after set color to a text.

If you use Microsoft Edge, the no color is not present.

Steps To Reproduce
For Google Chrome
Steps to reproduce the behavior:

1. click to background color
2. click in document to close colors list
3. click to background color
4. the "no color" is no longer there

Expected behavior
Always "no color" present in list of colors.

Screenshots
Google Chrome
first click:

reopen list of colors:

Microsoft Edge

Your Configuration (please complete the following information):

• Exact BookStack Version (Found in settings): v0.23.2
• PHP Version: 7.2
• Hosting Method (Nginx/Apache/Docker): Apache 2.4

Additional context
No additional information.