Make custom max-width on row conform to Boostrap convention

Bootstrap break point for tablet portrait 768 keeps the row intact, so it's not appropriate to have off-canvas elements at that width. Custom off-canvas.css should be breakpoint 767px
Prevent X-scroll on small screens

html overflow-x must be hidden to prevent accidental x-scroll on small screens. This is more apparent with touch screens, where the user often gestures diagonally instead of a true vertical gesture.
Fixed glyphicons count

Glyphicons are 200

refers to #9794
derp, add on to #10153 with proper variable /cc @ggam
Completion of parentheses
Merge pull request #10364 from wangsai/patch-1

Completion of parentheses
Update index.html

Updated text in the jumbotron container to reflect the Bootstrap 3 change from 'hero unit' to 'jumbotron'.
Merge pull request #10366 from coliff/patch-2

Update index.html (change from 'hero unit' to 'jumbotron')
Merge pull request #10374 from tagliala/patch-2

Fixed glyphicons count
Refactoring the paragraph describing the 'Examples' section.
Getting Started page: Simplified and focused the text of the 'Disabling responsiveness' section.
update box-sizing third party support section to include mention of google CSE and expand to include CSS and Less options
Merge branch 'master' of github.com:twbs/bootstrap
Merge pull request #10382 from StevenBlack/GSEdits5

'Disabling responsiveness' section of docs: simplification and focus
fixes #10372: two download buttons on homepage; also fixes broke button styles
mo betta docs on box-sizing to build on e521ee83094f5a70978cc9d879f400c3ac95369c
Merge branch 'master' of github.com:twbs/bootstrap
remove unused .panel-collapse ruleset
Merge pull request #10375 from StevenBlack/GSEdits4

Refactoring the paragraph describing the 'Examples' section.
fixes #10396: mention table class change in migration docs