#16 Better backup plan for local collisions not being resolved
#16 Better backup plan for local collisions not being resolved

When collisions are not all resolved, resort to pullItemsToLeft(item)
only in that case, as a plan B.

thenaughtychild/grid,hootsuite/grid,thenaughtychild/grid,uberVU/grid,uberVU/grid,hootsuite/grid,boxed/grid,zaeem/grid,gasparfm/grid,gasparfm/grid,zaeem/grid