Dock icon update

Non-square album art is working again as shown in the screenshot below (see yesterday’s post for an image showing the incorrect behaviour):

At the same time I took the opportunity to implement customizability for the badge size, position and border width.

Still to fix is a minor off-by-one glitch which you can see in the image below; note that the badge and the border do not have a perfect fit yet:

And also, non-rectangular album art needs to be centered and the affine clamp effect cleaned up: