Have a dark meta theme color

[dctremblay]

Is your feature request related to a problem? Please describe.
Not a problem whatsoever, only polishing request.
I'm using Teable as a PWA in Chrome, and the title bar is white but should be dark.
I guess there's also similar behavior with mobile browsers.

Describe the solution you'd like
When Teable is in dark mode, have something like:
<meta name="theme-color" content="#000000" />.

Describe alternatives you've considered
Chrome extensions: Dark Reader or Tampermonkey.

Additional context