Part of STUD-847.

BLD-426

Make tests conform to new import UI

Also change test to not expect text_customization

Cleaned up files with muliline imports

Cleaned up files that do not use these imports

Misread comment

Removed set traces

Fixed display-name bug and added in a function to trigger events on firefox as well as check if it is firefox

The defaults used to be rerandomize=always, showanswer=closed. This is
preserved for capa problems being imported from XML. However, for
courses, and for problems created in Studio, the default has been
changed to never/finished, to match the previous defaults used by
Studio.

Instead, we use XModule field default values when creating an empty
XModule. Driven by this use case, we also allow for XModules to be
created in memory without being persisted to the database at all. This
necessitates a change to the Modulestore api, replacing clone_item with
create_draft and save_xmodule.

This standardizes the XModule field default values to be the same as the
values that are presented by studio when a component is added to a
course.

css_click will try clicking multiple times.