* adds direct jump of viewport on related-data action (create/delete)
* refactors sharing user setting by introducing share_with(user) and share_with_list(user_list) for BaseObject for a more self-explanatory sharing
* adds EcoAccount tests * fixes bugs found by testing
* adds EMA tests * extends compensation tests * fixes bugs detected by testing * restructured tests for performance boost
* adds tests for compensations (WIP) * refactors some dummy data generating into base test class * fixes bugs detected by testing * adds important requirements.txt change for itsdangerous package (<1.0.0 for compatibility to django-simple-sso)
