Support for fixed-width columns.

[chris-muller]

The ability to have one or more fixed columns.

Suggested syntax:
columns( (200px,1,100px) );

This would have the first column be a fixed width of 200px, a last column of 100px, and the remaining space taken up by the middle column.

[chris-muller]

Some required logic/changes.

• Check column values to see if they are units or ratios.
• If units, subtract the total from the available ratio width.
• When iterating to assign widths, test if column is a ratio or a unit.
• When summing columns, sum only the ratios?

[chris-muller]

Might be better to separate final width calculation into its own function, allowing order() and columns() to use the same calculations.

Then they can iterate through the returned list and apply the widths. This will ensure order continues to work when changes are made to the logic.