George Tsiolis authored Jul 08, 2019 and David Pisek committed Jul 25, 2019

This commit introduces a new size (24x24) and maps it to "md".

Consequently larger than "md"-sizes also get changed, and a new size
option (xl) is added:

"md": 32x32 -> 24x24
"lg": 64x64 -> 32x32
"xl": 64x64

It also updates related storybook documentation and adds additional
component-examples.