Added:

• Added vertical and horizontal selection reflection 
• Added selection stretching 
• Added selection rotation 
• Added MP4 exporting

Changed:

• Updated program icon

Fixed:

• Fixed bug that would crash the program when attempting to call getFileName() on the root of a Path 
• Fixed bug that would crash the program when performing an undo/redo operation that resized the canvas - was caused by those operations not redrawing the checkerboard transparency background