TouchDraw 1.2.3

Useability Enhancements
   * 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.
Bug Fixes
   * 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.