(also fix license banner generator bug)

To the middle of nowhere
To the middle of my frustrated fears
And I swear you're just like a pill
Instead of makin' me better,
You keep makin' me ill
You keep makin' me ill

adds .label-pill to replace .badge

Round paddings of .container & .container-fluid to match .row's margins

fixes #16769: use a clearfix on the .modal-header instead of a min-height to avoid collapsing when only a dismiss button is available and no .modal-title

Show active buttons when form disabled

Fixes #16779: Add padding to jumbotron with outer container

fixes #16902: remove the .container-fluid from the grid system in modal example since it's doubling up padding

Multiple button input groups

Move help block docs up page, add `.help-block` to validation example

Confirmed that Edge still suffers from two IE11 bugs

[skip sauce]

Simpler docs footer

Smaller local Expo screenshots