As far as I know *we* never could make that style pop-up, which begs the question: what template is this? Is it Apple native, or somebody else's? FxFactory has a "developer's toolbox" kind of API thing (which is why a lot of their templates break at major OS upgrades), so they might include the ability to apply menu separators (I wouldn't know... I don't go through FxFactory for my stuff). As far as Apple goes, I know there are "proprietary" things in Motion that they "do not allow" public access to. (For example: there is a specific "strings" that can be used for Text objects that will display various information about the clip an effect is applied to. [Don't ask. I'm not tellin'. If you figure out this menu separator thing, and it can be done in Motion alone (no outside plugins) — I'll trade you ;) ])
You *might* be able to pull off a trick. Drag the widget (or the entire Rig) to your Favorites from the old project. Open your new project and see if you can drag the widget/rig back into the new one. If you can, you will need to re-wire all of the controls, but you may also get to keep the separators. The reason why I recommend the saving the entire rig is because, if this is an Apple template, a lot of their templates add other widgets into published widgets (be very careful not to published widget widget controls - duplicated published controls will break) and there will be dependencies. [I've been able to save old copies of Droste, Primatte RT and a few other discontinued items this way.]
