Doc fixes related to #9523
Update css.html

I know the form code are only examples, but it'd be good to encourage usage of the proper input type for the email inputs by changing the type from "text" to "email".
Merge pull request #9598 from coliff/patch-5

Change input type for the email input examples
Merge pull request #9591 from BBosman/9523

Doc fixes related to #9523
fixes #9607: restore bottom border on hover of nav tabs for proper display
Merge branch '3.0.0-wip' of github.com:twbs/bootstrap into 3.0.0-wip
fixes #9586: add documentaton on how to disable the responsiveness of BS3
update to include nav link and mo betta docs on that last commit
fixes #9616
fixes #9613: update docs css to prevent misaligned buttons example
Fixes #9617: consistent variation order, add .label-primary
fixes #9596: proper dropup caret colors
fixes #9600
add clearfix mention to another grid example and clear up examples
fix up inverse navbar form styles
Add to #9578 and fix #9614: use cursor not-allowed on radios and checkboxes
delete comments
copyediting tweaks to "Disabling responsiveness" docs
more fixes for #9513
Merge pull request #9625 from twbs/fix-9513-more

more fixes for #9513