The default-base theme should only style Radzen components, and leave browser defaults alone

[jnsn]

Is your feature request related to a problem? Please describe.

When using the default-base theme, I expected it to leave everything alone and just theme the Radzen components, but it's coloring the browser scrollbar too.

https://github.com/radzenhq/radzen-blazor/blob/8a8be30657266a33670df29fb3b1b3066cc82a2c/Radzen.Blazor/themes/components/blazor/_scrollbar.scss#L5-L36

It took me a good while to figure out where this was coming from, since it's counter intuitive and not documented at all, as far as I found.

Describe the solution you'd like

Don't color the scrollbars using the default-base theme, as this should only style the Radzen components and not interfere with the already present style or default styles.

Describe alternatives you've considered

Improve the documentation that adding the .rz-default-scrollbars class to the body element will not add the styling.