The keys having a magenta background are the ones that are done. Changes
worth mentioning:
- key "4$" vs. "6^": see the difference of the two layout while having
the same amount of information.
- key "9(" vs. "0)" (same as 7 vs. 8): the first key contains one
text element and the spacing of between the top and bottom is based on
line-height, while the second key is divided into 0.5-1-1-0.5
portions, and the two text objects are aligned in the middle sections.
This latter layout is more consistent with other parts of the keyboard
as this same approach is used on the key "4$", and the benefit of this
layout is that we don't have to deal with line-height, and can easier
control the final layout.
