Merge pull request #4167 from LaurentGoderre/multimedia-fixes

Fix a Youtube player JS error that getDuration is not a function
Merge pull request #4177 from pjackson28/inviewmoredirectinit

Data-inview: Made plugin init more direct by removing the intermediary event trigger
Merge pull request #4178 from pjackson28/wetthemesmallviewlogoclick

WET theme: Made small view logo clickable
Toggle: add onbeforeprint behaviour

1. Allow a toggle element to turn the elements it controls
   on/off when the page is printed.
2. Update the working examples with the new "print" option.
Toggle: add unit tests for onbeforeprint
[Equal height] Made the code that looks at the CSS case insensitive and modified the regular expressions to deal with the fact that IE8 rewrites the CSS attributes.
Merge pull request #4180 from thomasgohard/fix-eqht-ie8

[Equal height] Modifications to deal with IE8 rewriting CSS attributes
WET theme: Ensured that the active area for the menu button in small view is 50% of the header width (fixes #4181)
Merge pull request #4182 from pjackson28/fixwetthememenubutton

WET theme: Ensured that the active area for the menu button in small view is 50% of the header width (fixes #4181)
Merge pull request #4179 from patheard/onbeforeprint

Toggle: onbeforeprint behaviour
Demos: Remove prettify load from demo table

Not used after the switch to the demo generation since the frontmatter
doesn’t allow html tags
Merge pull request #4184 from nschonni/v4-demo-remote-table-prettify

Demos: Remove prettify load from demo table
MathML: Inline polyfill loader

Due to poor support of the element, this will remove an HTTP request on
most pages.
Multimedia: Inline "tmpl" from helpers
Forms: Added Bootstrap CSS to the submit and reset buttons (fixes #4135)
Merge pull request #4188 from pjackson28/addbootstrapformbuttons

Forms: Added Bootstrap CSS to the submit and reset buttons (fixes #4135)
Merge pull request #4185 from nschonni/v4-inline-mathml

MathML: Inline polyfill loader
Build: Serve 404 page with connect
[CSS] Remove the position CSS for the xxs and xl breakpoints.
Merge pull request #4193 from thomasgohard/pstn-css-remove-extra-breakpoints

[CSS] Remove the position CSS for the xxs and xl breakpoints