Use container instead of parent for tooltip/popover auto-placement calcs

Fixes #14561. Big thanks to @wickstargazer.

[skip validator]
Merge pull request #14623 from twbs/fix-14561

Use container instead of parent for tooltip/popover auto-placement calcs
tooltip.js: fix alignment
Update dependencies.

Close #14664.
rm redundant grid column classes from responsive utilities demos
grunt
Add type to buttons in tooltip-viewport example
Fix anchor link
Merge pull request #14691 from Quy/master

Fix anchor link
Fixes #14687: Include video element in responsive embed
Fixes #14682: Remove quotes reset on blockquote elements as it causes rendering bugs
grunt