Add exception handler for better error reporting
Add method to get total weight of IFS determinants
Improved CSS for details view

- Use cell border for matrix brackets
- Add colour swatch for each transform when available
- Show percentage wight based on determinant
Add configuration property for window size and tidy up definitions
Increase filter coefficient to make splash screen readable
Fix some coefficients and tidy large number formatting
Add minimum size for window
Add TODO tasks for UI
Stop timer when viewer is not visible