improve display of paradigm columns with long headers

[dwhieb]

From Arok:

Sometimes when the name of a paradigm column has a long header label, it creates some unsightly space in the paradigm table:

Can we find a way to improve this visual display? Some initial ideas:

• Right now the <table> element contains two <tbody> elements. Maybe we could pull those into separate tables, so at least the spacing of the one <tbody> won't affect the other.

• Force the columns to always be equal width. Is this possible in CSS without knowing that width in advance?