This adds a slide class that specifies that the JS actions for sliding
up and down sections is the desired behavior, along with a bit of CSS
to help display correctly in the case of not being a sliding section.
In addition to decreasing the excessive number of bundles we had, this
will set us up to fix rendering of code blocks when clicking the
sidebar links in the /api-new site.
This adds back the perfectScrollbar for the sidebar and markdown
sections because we already lost CTRL-F functionality, so we may
as well bring back the pretty, non-obtrusive scrollbars.
This updates the scrollbar after a successful `slideToggle` of
one of the sidebar sections.
Fixes: #6999.
This tries to toggle the next item when clicking on an <h2>
in the sidebar, however we want to first check the next item is
an <ul> element, so that we are collapsing or showing a list,
instead of something like an <h2> which currently happens with
the "#guides" element.
This makes the /help/ sidebar more discoverable at windows less
than 1000px in width because it makes it stick out a bit when it
is closed with the hamburger menu at the top.
Fixes: #6038.
This redesigns the /help/ page sets to be a single page app that uses
history.pushState to work the same as the old app.
The big new feature is that now we have the index in a nicely designed
left sidebar.
