Topic: 0.4.3 released

- Added advanced options checkbox to settings
- Added support for multiple accounts per brokerage
- Fixed bug when testing import with multiple accounts
- Showed that account is optional, added Update Account button
- Fixed bug when deleting portfolios
- Disallow deleting S&P 500

- Added Import Transactions menu to Portfolios
- Added error message when can't connect to institution
- Fixed critical error with charting with no portfolio data present
- Improved startup process when can't connect to internet
- Improved robustness when loading plugins with errors
- Prevented Sample Portfolio from being created multiple times