Co-authored-by: NBabur Ayanlar <baa@client3873.office.ableton.com>

* Use dark table variant colors in dark mode

* dark and light variants can be removed as they are not shifted

Load the theme code as fast as possible to prevent flashing the light theme
before fetching and applying the dark theme from the URL or localstorage.

Co-authored-by: Ncodecalm <codecalm@gmail.com>

* added required class to showcase in horizontal form

* support for required label class in horizontal form