Minimize markup for supplier dashboard.
Minimize markup for supplier dashboard.

The "column-one-whole" div containers surrounding the different sections
of our supplier dashboard were unneeded. Get rid of 'em.

alphagov/digitalmarketplace-supplier-frontend,alphagov/digitalmarketplace-supplier-frontend,alphagov/digitalmarketplace-supplier-frontend,alphagov/digitalmarketplace-supplier-frontend