Add nested kbd element styles for actual keys or inputs
Fixes #13478, reverts #10941
Merge branch 'master' into icon_paths

Conflicts:
	dist/css/bootstrap-rtl.css
	dist/css/bootstrap.css.map
	dist/js/bootstrap.min.js
	docs/dist/css/bootstrap.css.map
	docs/dist/js/bootstrap.min.js
Merge branch 'master' into icon_paths

Conflicts:
	dist/css/bootstrap.css.map
	docs/dist/css/bootstrap.css.map
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Update showSuccess to use new classes
Hopefully a fix for #12364

* register the callback before invoking the toggling
* listen for `hidden` instead of `hide`
* account for the possibility of the associated `show` event being preventDefault-ed

Adds relevant unit tests.
Merge branch 'master' into icon_paths
Applied translate3d to modal, navbar-fixed and affix to combat browser repaint
Merge branch 'master' into icon_paths

Conflicts:
	dist/css/bootstrap.css.map
	docs/dist/css/bootstrap.css.map
Table-responsive: changed overflow-x to auto to hide scrollbar when it's not overflown, fixes #13669.
text transformation added

Transform text in components with text capitalization classes.
Color Contrast for panel heading

related to #13686
fix variables in panels.less
removing unnecessary max-width on tables
Fix bug where a panel recieve extra top border

https://github.com/twbs/bootstrap/issues/13734

A panel placed inside of a collapsible panel recieve extra top border.

This commit reduces the effect of a selector to apply a border only to
the collapsible panel body itself, not to any panel placed within it.
Resolves Issue #13689

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.
Use px for font-size fixes #13737
replace SemVer summary with a link to its website; fixes #13650

[skip validator] [skip sauce]
Merge pull request #10632 from stuartpb/patch-1

Customizer: Alert on successful save to Gist