Wire up done event for 401(k) section of step 2. Resolve logic error related to calculating presence of percentages. 0 is a valid percent but evaluates to false at runtime. This caused the state to revert back to thumbnail instead of the summary view. Remove defaults of 0 from 401k plan model since 0 is a valid value. This allows plan percentages to default to undefined instead, which will also evaluate to false at runtime; putting the 401(k) section in the thumbnail state as opposed to the summary state.