Sum factor (#54) * define a sum-factor and implement its editor * implementation of the sum factorial report * Sum-factor report implemented in submission view, non-factorial survey has weighted options * fix freaking weird bug in the color palette element * fancy up the forms and the sum factor report * update snap-shots * make condition of factorial-options * improve factor report layouts and designs * update snapshots * final clean-up and documenting privateSpec * add tests and snapshots * fix window scaling for sum-factor report * update user manual * update tests and snapshots * fix test * fix test 2