* Improved loading and saving performance.
* Improved usability of the document chooser.
* Increased the font size in the text editor to improve readability.
* Limited the undo and redo stack size to 20 operations to improve memory usage.
* Fixed a bug which could cause a crash when creating an image of an empty drawing.
* Fixed an issue which prevented some drawings not being completely visible in the drawing view upon load.
* Improved handling of unexpected errors to prevent crashing.
* Fixed an issue connecting shapes deeply nested in groups.