Formula works out font width for given column width
Formula works out font width for given column width

This formula assumes that the font width and column width are
proportional in a linear fashion. It calculates the font width based on
this formula and seems to work for column widths in the range of 15 to
150px.

Janelia-Farm-Xfam/hmm_logo_js,Janelia-Farm-Xfam/hmm_logo_js