This makes the reset button to refresh the contents of a Randomized
Content Block (RCB) without reloading the full page by fetching a new
set of problems in the "reset" response and replacing the DOM contents.
The reset button returns the student view as a string and the client
uses the HtmlUtils package to replace the contents and reinitializes the
XBlock.
This allows students to use the RCB as a flash card system.
Co-authored-by: tinumide <tinuade@opencraft.com>
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