Adds a (horribly named) property used by the actionSelector to remember its original action and flip back/forward between it and the alternate as ⌘ is pressed and de-pressed.
Since the aSelector's objectValue is set to the alternate action immediately once ⌘ is pressed, this change also removes the need to do a further check down the line (in QSInterfaceController.m). Mmmmm tidiness :)
This was getting called immediately after `makeKeyAndOrderFront:`, causing a lot of code to be run twice. The documentation says it generally shouldn't be necessary and I don't see any difference without it.
Previously, the `details` method would need to be invoked *twice* to yield the correct result. (The first invocation would cache the details, and the second would return it from the cache.)
Whether or not the details can fit in the results list has nothing to do with whether or not they can fit in the main interface. In the context of the results list, the details string is already being handled appropriately by `QSResultController`.
I think this was meant to be a fallback value, but since primaryType is *always* a string, it was returning the fallback the first time this method was run. After that, the cached value would be returned.