Outline effect not working satisfactory

[vlidholt]

The new outline effect has several issues, it should either be fixed or removed. In it's current state it's hard to see any use case for this effect.

• The outline is actually not an outline, instead it's drawn inside the image.
• The outline doesn't cover the outermost pixels.

[vlidholt]

Disabled in 1.4, moving issue to 2.0