Make the mapping edit feature pass again

The specs for the ToggleMappingFormFields js module were not being
run because the filename didn't end 'spec.js', and after renaming
the file I found that 4 of those tests were failing (on master as
well as on this branch). I've updated the tests so that they look
ore up-to-date, but they are still failing and the output from
rake jasmine:ci isn't very helpful.
Make mapping_create_multiple feature pass again

And also hits_all as a side-effect.
Make mapping_edit_multiple feature pass again

All features and specs are now passing, and the only remaining
failing test is the javascript one which was already broken.
Make the ToggleMappingFormFields js spec pass

With thanks to @fofr. Everything is now green!