add: new labels for standard buttons.
add: uses fallback events, when no event could be selected.
mod: fallback events for when event selection goes wrong.
fix: stat changes by zero don't appear anymore.
add: the spot type is added to the spot's event tags.
mod: if events type inference fails (task has no explicit type and no traits to assume one), the running event is either ended or in case of startEvent() set to a fallback event.