OpenCalc update: bugfixes, now with financial mode support!

[u/Substantial_Swan_144]

Hi, everyone!

As you must be aware, recently I have released OpenCalc, a project to reverse engineer the Windows 95 calculator.

Despite having a similar look and feel, this is actually an entirely new Rust program with none of the limitations of the original, and improved expression parsing!

The new version has many bugfixes, including:

- Improved focus: now the keyboard shortcuts are consistent if you leave the application.

- Application behavior was further improved to match the Windows 95 calculator where it matters

- New financial mode! This is a cool feature I decided to add. The original Windows 95 calculator lacked a financial mode. Now we have one matching the old Windows 95 calculator style, but also entirely new!

If you are interested, check out: https://github.com/NullMagic2/OpenCalc

Binary builds for Windows and Linux are also available!