Reapply "Improved css reset for default.css"

[bdukes]

This reverts commit c5f81dd.

Second try for #7371

[Timo-Breumelhof]

It's this one, I guess. https://cdn.jsdelivr.net/npm/modern-normalize/modern-normalize.css
Yes that will fix the issue.
Might lead to other ones though, we'll see.
As I said before, I would remove it as IMO it's the theme's responsibility to load a reset.css

[Timo-Breumelhof]

@bdukes @valadas
I tested some more with the same theme (BS5)
Without the current reset (custom default.css) my aligment issues in tabels are fixed but some elements (in FF) get borders they did not have before. This is also the case with this new reset.

Looked like this:

Without reset or with the new one included:

I think my initial issue are caused by the DNN 7 default.css not having a border reset for td and the current version does.
This new one however does not reset borders to 0 and thus unexpected borders show up in some places.

Not sure I would add this new reset to DNN 10.4 THB and I think the "no risk" fix would be to not remove baseline like I did here:

#7406

But remove the lines for tables as they are a change.

And then postpone a more modern version to DNN 11?