Add airplane mode toggles to Maestro flows. - #286

…and lesson assertions.

…to_a_class_test.yaml` Maestro flow.

… with that tag.

…low.

…o include all tests.

…ript.

…n Maestro flows.

…oend-test

…tailed verification flows for user creation and assignment management.

…DME to include offline mode, downloading lessons, and statement submission.