- Drops all the `.make-**-column` mixins for a single set to be used
within (or outside) media queries.
- Renames `.container-fixed` to `.make-container` for consistency.
- Updates built-in grid system to use new setup.

See http://jsbin.com/qiqet/2/ for an example of it in action.

Fixes #13953: Remove the progress bar min-width styles for low percentages to avoid jumping progress

Fixes #12738 again: use max-device-width instead of max-width for .navbar-collapse height in landscape devices