Ensure that hidden event is sent when content is really hidden (collapsing class is removed)
Revert "Use mousedown instead of click for backdrop click detection; fixes #13816"
Remove `aria-describedby` attribute later

Fixes #14241
Collapse: count `.collapsing` elements as actives; closes #13447
Handle lack of .width and .height from getBoundingClientRect() in IE8

Closes #14093
Correction to #14090
Relevant docs: https://developer.mozilla.org/en-US/docs/Web/API/Element.getBoundingClientRect#Browser_compatibility
Update dependencies.
Run `grunt`.
Fix bug not re-calculating scrollbar width when opening modal.

If opening a modal when a scrollbar is present, closing it, then
resizing the window so the scrollbar disappears, then opening the
modal again, the content would shift. This fixes the problem by
always calculating the scrollbar width every time a modal is opened.

Closes #14357.
Merge branch 'stefansundin/master'
Properly hide checkbox and radio inputs in button groups

`pointer-events: none;` for modern browsers (including IE11+), `clip: rect(1px, 1px, 1px, 1px);` for everything else.

Fixes #14137
grunt
Fixes #14319: Prevent jumbotron reflow by ensuring padding of .container isn't interferred with by .jumbotron side padding
customizer: minor cleanup of IE8 error messaging code

[skip sauce]
Merge pull request #14563 from twbs/fixes_14319

Fixes #14319: Jumbotron reflow
Fixes #14557: Reset the bottom margin on .form-group:last-child in .navbar-form to prevent extra spacing
Merge pull request #14564 from twbs/fixes_14557

Fixes #14557: .form-group margin in .navbar-form
Variables for large and small input border radiuses
grunt
Add @hnrch02 to Core Team members list
Merge pull request #14566 from twbs/fixes_14542

Cleaned up fix for #14511 (input border-radii variables)