update the frontend interface based on the new terminologies

[jujusb]

1. SIMVA
2. SIMLET (SIMVA APPLET) instead of study
3. Session instead of test
4. SIMLET Supervisor instead of owner
5. Session Coordinator instead of owner
6. Participant instead of user in the dashboard
7. Game-client >> new terminology
8. Integrated game into SIMVA >> new terminology
9. Activity
   a. Limesurvey Activity
   b. Gameplay Activity
   c. Manual Activity
10. Activity Template >> new terminology
11. Activity Instance >> new terminology
12. Manual Completion for Activities
13. SIMVA dashboard