Ensure that hidden event is sent when content is really hidden (collapsing class is removed)
Remove popover content with .children().detach() instead of .empty() so it can be reused
Use .end() to remove extra line
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
README.md: Аmendment links to use HTTPS.
consistently use <nav> instead of <div> for .navbar in docs
Use single .dropdown-menu
Fix #14411 by setting JSON Content-Type for Gist API request
grunt
Assume Element.getBoundingClientRect() exists; Fixes #14093

[skip validator]
fixes #14282 - Already Visible collapse gets closed when .collapse('show') is called
Merge pull request #14244 from programcsharp/master

Remove popover content with .children().detach() instead of .empty()
Merge pull request #14406 from twbs/nav-tag-for-navbar

consistently use <nav> instead of <div> for .navbar in docs
Ukrainian site migrates to twbs.docs.org.ua
Merge pull request #14433 from KostyaTretyak/patch-1

Ukrainian site migrates on twbs.docs.org.ua
grunt
Fixes #14440: Remove unused nav variable
Fixes #14348: Add visibility styles to collapse and tab content to match .hidden