Isometric chart not available after changing years

[jasonlong]

When selecting a different year in the sidebar, the isometric chart and the chart buttons disappear.

[jasonlong]

Closed with #59.

[revolter]

This happens again, at least in Chrome.

[jasonlong]

Sorry for the delay! I see this as well and will work on a fix soon. Thanks for the heads up.

[jasonlong]

Fixed in #158