Fix: Modal does not have background outside viewport on small medials

If the reval modal is larger then the viewport the background disappears
when scrolling the modal up. The cause is the the height: 100vh, that
limits the height of the modal to the viewport height.
Allowing main breadcrumb color setting to work in nav and ul containers.
Merge pull request #4865 from karland/Patch-1

Fix: Modal does not have background outside viewport on small medias
fix clearing with blockgrid
fix ios 7.1 buttons
convert select to mixin. more refinment needed for 5.3 release
fix breadcrumb alignment on android. also, create more consistant look for breadcrumbs with ul or nav
fix dropdown color variable in topbar
Adds momentum scrolling back to the off-canvas elements when open
Fix error in comment in settings
adding basic static server option to gruntfile
adding the proper node package
Removes an embedded block grid example which is so shockingly bad it invites inevitable punishment.
Make Equalizer only calculate for visible elements
Merge branch 'master' of github.com:zurb/foundation
Pushing out bug fix for forms input transition check
Merge branch 'master' of github.com:zurb/foundation
Merge branch 'master' of github.com:freesurface/foundation into freesurface-master
Moved form-select mixin def out of another mixin
Remove unused folder