Adding shortcuts fails with aliases

Just ran into an issue when trying to add a toolbar shortcut for a path alias to a node. Basically the node path is node/123 but it has an alias of content/mynode. When I add the shortcut to content/mynode it appears to add everything ok. However, it doesn't add the item to the toolbar, and when I flush the caches it gets automatically removed from the list of shortcuts.

What seems to be happening, is that the alias has no actual menu router path, so when I clear the caches the menu cache automatically checks for bunk links and removes them. What I think the toolbar module should do is convert the paths from aliases to normal paths when they're encountered. The patch attached should mostly do that.

- Scott