Advanced modules must now be specified individually in order to enable them on the 'advanced' component menu.

of the tests fail.  Deleted some tests.

don't make caller responsible.

but fetch async via json get.

definition not being updated when using defaults. Not sure why this
passed before.

do the metadata comparison on the parent not the course as we don't actually know which vertical we ended up picking (could be arbitrary).

remove unused import commands (which were used for temporary profiling). Also change get_lms_link_for_item() to preserve the previous argument ordering. Apparently all callers may not use argument name conventions for the 'preview' argument.

restore metadata inheritance. Fix lms jump computation on the Studio index page. This gets expensive.

add another command line argument to allow users to only simulate a delete (i.e. show what items would be deleted). This is a handy sanity checker.

put back the inheritable_metadata list into the XModuleDescriptor class. Also extend the metadata_inheritance test case