pmap - removing the column width constraints in the -X/-XX modes

pmap - removing the column width constraints in the -X/-XX modes

This commit changes the width measurement principle in the -X/-XX
modes so that a width of totals is measured instead of the width
of summands. The value of totals is always higher than the value
of summands. That additionally prevents the totals from having
a wrong indentation.

This commit also removes the minimum column width constraints
hardcoded to 7 characters.