Fixes #12447: Properly reset borders on table cells in panels
Merge branch 'master' into panels_and_tables

Conflicts:
	dist/css/bootstrap.css.map
	dist/css/bootstrap.min.css
	docs/dist/css/bootstrap.css.map
	docs/dist/css/bootstrap.min.css
Merge pull request #12633 from twbs/panels_and_tables

Properly reset borders on table cells in panels