Pass along height to layout-bin-packer in mixed grid
Pass along height to layout-bin-packer in mixed grid

This fixes the dummy app so that it actually updates during a scroll.

aldhsu/ember-collection,srgpqt/ember-collection,emberjs/ember-collection,mrinterweb/ember-collection,greyhwndz/ember-collection,paddyobrien/ember-collection,flexyford/ember-collection,greyhwndz/ember-collection,shaunc/ember-collection,lukemelia/ember-collection,lukemelia/ember-collection,paddyobrien/ember-collection,BryanCrotaz/ember-collection,alexdiliberto/ember-collection,code0100fun/ember-collection,mrinterweb/ember-collection,arenoir/ember-collection,code0100fun/ember-collection,flexyford/ember-collection,mmun/ember-collection,aldhsu/ember-collection,nkgm/ember-collection,alexdiliberto/ember-collection,BryanCrotaz/ember-collection,mmun/ember-collection,nkgm/ember-collection,arenoir/ember-collection,srgpqt/ember-collection,emberjs/ember-collection,shaunc/ember-collection