Bug fixes and improvements

Tab References:
You can now reference one tab's total balance in another's initial balance. This is great for scenarios where you want to change the contribution amount or return rate in future years. For example, you can now experiment with the scenario of contributing $500 for 10 years followed by $0 for the next 10 years, and see the effects of compound interest over a 20 year time period. To reference another tab just tap into the starting balance and you'll see a toolbar above the keyboard with tabs that can be referenced.

Negative Return Rates and Contributions:
You can now invert your return rate or contributions to make them negative.

More Tabs:
There's no longer a limit on how many tabs you can add.

Customize Currency Symbol:
It's now possible to choose a different currency symbol than the symbol defined by your device's region. Head to the settings menu to see the options.

- Added support for light/dark mode to use system settings on iOS 13.

With version 1.1.0 we've added some exciting new features. 
Already have an end goal in mind? Instead solve for contribution amount, return rate, or length. Want to retire with $5,000,000 but aren't sure how much you need to be saving each month to reach that goal? Switch the mode to solve for contribution amount and it will automatically calculate that number.

• Solve for Total
• Solve for Contribution Amount
• Solve for Return Rate
• Solve for Length

- Changed the default setting to compounded annually.
- Added options to compound Quarterly and Semi Annually.
- Minor design tweaks.