Fix margin-bottom on dropdown (navbar-fixed-bottom).
Fixes #14990: Media bodies take up full width

Signed-off-by: Beatrice Peng <bpeng@pivotal.io>
Add warning to Customizer about Firefox bug; refs #15016

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Merge pull request #15395 from twbs/firefox-customizer-warning

Add warning to Customizer about Firefox bug
Merge remote-tracking branch 'upstream/master'
group Safari browser bugs by OS
Add Wall of Browser Bugs entry for #15205

Closes #15205
Merge pull request #15407 from twbs/close-15205

Add Wall of Browser Bugs entry for #15205
Add Wall of Browser Bugs entry for #11266, #13098

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Merge pull request #15415 from twbs/webkit-bug-139848

Add Wall of Browser Bugs entry for #11266, #13098
fix "propertes" typos in comments
automatic grunt dist
Merge pull request #15307 from vsn4ik/part_of_15148

Fix part of #15148.
Merge pull request #15391 from stubbornella/master

Fixes #14990: Media bodies take up full width
automatic grunt dist
grunt
http://crbug.com/438064 has been fixed

Refs #14972

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Merge pull request #15424 from twbs/chrome-438064-fixed

Remove #14972's entry from Wall of Browser bugs
Remove holder.js references from syntax-highlighted example HTML

Our use of Holder.js in the docs is a mere implementation detail.
Don't want to confuse people into thinking Holder.js
is somehow required by the Thumbnail component.

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Remove reference to old fixed WebKit bug in Less comment.

Per https://github.com/twbs/bootstrap/issues/1969#issuecomment-36971094

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