Add reset values option

[vv-monsalve]

This option would be great if you regret and want to take back the changes done into the palette options. cmd + z doesn't work.
But even if it worked, sometimes user would like to go back to defaults in a single step.

[Lorp]

Good point. Perhaps two reset buttons: one for the colours and one for axes.

[vv-monsalve]

Even better! Especially if you are going to include the CSS output

[Lorp]

For the axis values, now that the Default style is always available from the Style menu, I don’t think I’ll add any additional axis reset buttons. For the palettes, it’s still useful however.