Model Editor: link to original Java MW MML file

[#46622091]
Guardfile: Sass helper for Lab Fontface is needed
new publicationStatus type: "broken" 

[#46627537]
benchmarks:don't use 'sample' publicationStatus
shorten a couple of the longest Interactive titles
additional student/classic/motion models
Create simple model-not-found pane with link to NextGen

If we try to load a model in the embeddable page or
iframe with an id that doesn't exist, we show this simple
pane.

This won't be visible on the authoring page, as that page 
will fail before we get to this point.

[#45737301]
Interactive Browser: fix option serialization

[#46627537]

Use a "serialize" class to identify controls in the
header of the Interactive Browser that should be persisted
into the document.cookie.
links opening new windows should have tooltips

[#46642167]
lint common/controllers/setup-banner.js
support defining a model in the Interactive

[#45737301]
use Interactive for "Interactive not found" error

[#45737301]
An Interactive with an invalid model url

[#45737301]

To test the response of our pages when the Interactive
exists but the request for the model definition fails.
Display textBox in model container w/invalid url

[#45737301]
require lab_fontface Sass helper after Sass loaded
improve layout/display of Error Interactive

[#45737301]
always open text component links in new windows

[#45737301]
improve layout, background color of Model URL error

[#45737301]
more complete invalid model url Interactive

[#45737301]

A more realistic example of an Interactive with a model
url references that can't be resolved.
Sampler: add missing Interactive and bad model url

[#45737301]