Updates:
- Added an easily selectable light-colored theme option.
Bug Fixes:
- Fixed errors that occurred when dragging and dropping nodes and files.
- An error setting some page sizes for printing was fixed.
- Fixed the appearance of the print preview when a dark theme is being used.
- Fixed the appearance of the time edit widget when used with a dark theme.
- A problem with the option to minimize to the system tray was fixed.