Add nested kbd element styles for actual keys or inputs
text transformation added

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

related to #13686
fix variables in panels.less
Fix gutter variable
Merge pull request #13777 from BBosman/fix-gutter

Fix gutter variable
<input> buttons line-height Firefox bugfix has been shipped!

Remove Wall of Browser Bugs entry.
Update mention of the bug in the CSS docs.
[skip sauce]
Merge pull request #13780 from twbs/fx-30

<input> buttons line-height Firefox bugfix has been shipped!
MD/CommonJS/Globals #12909
Merge pull request #13772 from twbs/fat-amd

AMD/CommonJS/Globals #12909
fix #13220 Scrollspy generates wrong offsets for a page-- recalculate offsets if `scrollheight` changes
button-groups.html: fix grammar: "in on" => "on"
grunt
Merge branch 'master' of github.com:twbs/bootstrap
fixes 13609 - Modal is shifting left just before the hiding animation
hidden and auto
Merge pull request #13785 from twbs/fat-13609

fixes 13609 - Modal is shifting left just before the hiding animation
grunt
Fixes #13548: Use position: absolute; to fix checkbox and radio line-height problems that were introduced after #13003
fix thumbnails docs