Un-pin fullwidth interactive [#48685567]
(Quotes shouldn't break specs…)
Fix related-content layout [#48685567]
Removing width attributes from MWInteractive model

This takes out the now-obsolete percentage-width float and fullwidth boolean attributes. We will adjust the size of the iframe dynamically with Javascript. [#48685567]
Updates to mw_interactives_controller_spec
Clearing out a pending spec
Holding out pending tests with no foreseeable future
Correctly re-sizes interactives [#49075313]

The "native" height and width set in the edit mode are used to calculate an aspect ratio which is included with the iframe tag as a data attribute. The width of the iframe is set to 100%, so it fills its container. There are a few lines of JS which run on page load which determine the aspect ratio and the actual width, and adjust the height accordingly.
Clearer comment
"Check answer" function is optional now
Use ujs instead of on click for checkAnswer