In its current form it is bad for performance due to the ITargetablePositions look-up, and fixing that only to remove the hack entirely a few weeks later would be kind of pointless, so let's get this over with.
Rectangle shapes always assumed that either top-left or bottom-right would have the largest distance from actor center, which is wrong, because depending on the position of the shape, top-right or bottom-left can be the furthest away corner as well, potentially resulting in a too small OuterRadius.
