As there are - or at least may be - other keys on the layer, not just NumPad
ones, those should be highlighted too.
Addresses the bulk of keyboardio/Kaleidoscope#149, by comparing the looked up
key with what is directly on the `numPadLayer`: if they are the same, then it is
a key that we assume changed, and do the coloring. If they are different (in
other words, the key on the `numPadLayer` is transparent or off), we skip the
highlight.
The downside is that we highlight layer switching keys too, which we may not
want. That will be addressed separately.
Signed-off-by: Gergely Nagy <algernon@madhouse-project.org>
Gergely Nagy
4f7e60ec52