v1.4.1

Patch

What's fixed:

• Crash when trying to edit 6x6 sudoku
• Generating difficulty (Related to #31)
• Wrong row/col of initial digits in saved game screen, resulting in some initial digits to be colored as entered by user (#32)
• Attempt to enter a number in a locked cell can be undone (#33)

Full Changelog: v1.4.0...v1.4.1