frontend: set data source to hourly on mount if display is week

Our chart uses `daily` as its `source` default state value.
Instead, we need to make sure to set this `source` state to
the appropriate value according to the stored `chartDisplay`
in the context.

Other than as a best practice, this fixes an edge case bug.
Such as wrong data & difference displayed when user does the
following:
1. picks USD as default currency,
2. navigate to a different page,
3.  and going back to account summary.

Author: shonsirsha

frontends/web/src/routes/account/summary/chart.tsx

@@ -93,6 +93,9 @@ class Chart extends Component<Props, State> {
   };
 
   public componentDidMount() {
+    if (this.state.source !== 'hourly' && this.context.chartDisplay === 'week') {
+      this.setState({ source: 'hourly' });
+    }
     this.createChart();
   }