Alternative task in app for control group

[zven]

We got the feedback that the control group would also need a comparable task as the actual group (= doing something in the app every day).

Todos - specific to control group:

• [x] create concept: How can we combine two different UI sets in one branch? For the control group, we need to provide a trimmed feature set / slightly different wording for the reflection task.
  • [x] persist current app-state
• [x] remove: "Explore trajectories" button from main menu and tracking menu
• [x] remove: "Add your own trajectory" button from main menu
• [x] disable computation of inferences

Todos - in general for study 1:

• [x] remove sub-text on "Record your own trajectory" (-> "get notified when ...")
• [x] remove notifications toggle from "tracking menu"

[zven]

Update: We decided to simplify the control group feature of the app even more. The control group will use the app only as a tool to write down their diary entries. Hence, we also do not need the tracking menu.

For the diary view, we would also need a different text, e.g.: "How have you used your smartphone today?", "Wie hast du heute dein Smartphone genutzt?"

Todos:

• [x] remove tracking menu
• [x] update diary question / task description