As in #7284, it can often be useful to style text like a heading in
places where using the heading tag would be either semantically
incorrect, less accessible, or otherwise invalid.
Support this in .jumbotron as in the rest of the document by allowing
elements with class .h1 to stand in for the h1 element.
Signed-off-by: Kevin Locke <kevin@kevinlocke.name>
Appending stylesheets by iterating the `__less` Hash creates an order
that is not the same as 'bootstrap.less'.
Some stylesheets like 'component-animations.less' and 'modals.less' have
selectors with matching specificity, and so file order decides which
style wins. This causes issue #10030 by putting `.fade.in` after
`.modal-backdrop.in` and gives the backdrop a higher opacity than
intended.
This change uses the Less ordering in 'bootstrap.less' to generate the
final stylesheets in the Customizer to make sure customized file
ordering matches the distribution file order.
Fixes#10030
