- Moves from no set line-height (inherited of 1.5) to declared 1.25 for
all inputs and buttons (regardless of size modifier).
- Updates padding to be `.5rem` instead of `.375rem` so that padding is
more likely to be whole numbers based on the root font-size.
- Whole numbers will be beneficial in avoiding odd fractional pixels
that can lead to misalignment as shown in #18607.
- Large buttons and inputs are now a tad wider, and smaller
buttons/inputs a tad shorter and narrower, too.