Add keyboard shortcuts

[costales]

<Alt>+[0|1|2|3|4|5|6|7|8|9]
<May>+[0|1|2|3|4|5|6|7|8|9]

0 = Restore
1 = 1st color
2 = 2nd color
[...]

reference

[JPeisach]

That could maybe interfere with other stuff

[woiwoiwoiwoi]

Five years and 8 days later I just had the same idea. Shortcuts would make my workflow so much quicker!