offline-capable

The whole wrapper is currently German-only, it would be nice to have an option to localize the app (strings, menus, app name + description).

Is your feature request related to a problem? Please describe.
Currently the timeline offers a stretch effect when dragged left or right. It doesn't seem to have any perceived UX value.

The same effect is in place for vertical stretch, where it makes more sense because the timeline is a fluid list of events that can expand in both directions with newer or older events.

**Describe the so