modal-dialog.scss : Match styling for the dialog ✖ close button.
modal-dialog.scss : Match styling for the dialog ✖ close button.

I was never able to work out why we lost the default JQuery UI styling
on our dialog close button. This here is the best I could do for matching
the original styling.

[#49442421]
https://www.pivotaltracker.com/story/show/49442421

concord-consortium/lara,concord-consortium/lara,concord-consortium/lara,concord-consortium/lara,concord-consortium/lara