canvas.py Issues

[duskfallcrew]

5. canvas.py Issues:

Text Tool Implementation: When you click to use the text tool - It does not implement the click function properly

Path Reset: The path for smooth line drawing was not always being reset (this was mostly a cause of the drawing issues), we'll fix this by setting the path to a default path in mouseReleaseEvent.

Ghosting: The Ghosting logic was adding another layer on top of the current image and not simply "ghosting" the previous layer - Causing odd effects when drawing.

Blender Tool: The blender tool has a hardcoded opacity, we need to fix this.