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

Now we are on par with what we have on the gh-pages dist/ folder.

New text align class, .text-nowrap, for preventing text from breaking to new lines. Applies it to the grid docs table.

Fixes #13548: Use position: absolute; to fix checkbox and radio line-height problems that were introduced after #13003

[skip validator] [skip sauce]

Doing this the right way this time. Hiding .panel-footer top border when
preceeded by a .list-group. This should resolve the "double border"
issue.