Add BottomNav

[birkskyum]

Chunking the improvements in #535 up into smaller pieces that we can review separately.

• Add BottomNav and other improvements #535

This adds a Bottom Navigation to the current site, without changing anything else on the page.

After:

Before:

[CommanderStorm]

Content LGTM.

Alignment wise, I think this is a bit too right-heavy -> more symetric would work better

[birkskyum]

@CommanderStorm Not sure i understand. I've centered it a bit - looks like this now on large screens. Is that what you meant, or did you want the two right most columns swapped? Instead of me guessing, can you do the style-change you'd like to see?

[CommanderStorm]

I pushed a change, it is a bit ugly, but likely what we want.

Could you have a look if this is too ugly of a hack?

[birkskyum]

I think i'm in favor of the initial style here that Bart submitted. Not very common to have right aligned content.

• Add BottomNav #541 (comment)

Remember, with a potential split of About, we might find entries enough for a fourth column (like adding a Branding assets link etc)

[birkskyum]

How about this - I added a brand asset header id so the link goes to the right place on the About page

[CommanderStorm]

How about a compromise:

• gutters between the rows when stacked, so that they are not entirely on top of each other
• only 2 instead of 4 rows on sm + md
• text-center, so it does not look off-center