Minor fixes in the insights section.

New insights section added with interesting information about your net worth history.
Now you can import a backup directly by selecting the file.
General improvements.

Now you can add liabilities (negative values) as part of your net worth.
Each asset can now be freely sorted.
Minor fixes.

"Term account" gets a different icon and color.

Minor fixes and performance improvements.

New visualizations and better UI.

Added a pie chart based on your asset type.
Added bright mode and more customization options.

New visualizations and more customization!
- See your net worth in a bar chart.
- Import and export a backup