Ticks är inte dynamiska och y-axeln max för låg vid antal under 10

[larspett]

[ScientiaFelis]

Fix two different errors:

• [x] decrease the threshold for when max on y-axis jumps from 10 to 20
• [x] correct the fixed "ticks" between groups on x-axis, they need to be dynamic so the look equally long independent on how large the y-axis is.