Portfolio Value and Gain/Loss charts

We've added a new chart type: Converted Portfolio Value. This chart displays the equivalent value of all of your portfolio accounts and addresses, in each different currency.

You can add this chart by clicking the "Add Chart" button at the bottom of any portfolio, or by resetting your charts to their defaults.

We've also added new gain/loss markers for the Portfolio Balances and Portfolio Value charts. By default, these display the gain/loss for a particular currency over the last week. (Soon this period will be configurable.)