List current smart item as first

[nearnshaw]

When I'm setting up actions for a smart item, I will very often have to select the current smart item from my list of smart items in the scene. This list can potentially be very long, and it's not alphabetical, and it doesn't follow the order of the entity tree in the scene either, so finding this smart item can be a challenge. It can be an even bigger challenge if my smart item has a long name, and the length of the name is cut... maybe I even have other items where the visible part of the name is identical.

To make things easier, we should always list the current smart item you have selected as the first one in the list, this can shorten this process quite a bit.