v5 breakpoints divisible by 12

Created by: 719media

I see this line in the v5 (and v4) docs: Each breakpoint size was chosen to be a multiple of 12 and to be representative of a subset of common device sizes and viewport dimension

I have run into fractional pixel issues myself when stuff isn't divisible by 12 (column count), so I get the reasoning.

However, I am noticing that the new xxl breakpoint is 1400px, NOT divisible by 12. Just figured the explanation should be updated, or the default breakpoint should be changed to something like 1440px