Most of the messages are using the plain `id (collapsing, etc); I preferred avoid to adding `outer` everywhere or having two auto generating functions, and also expose it to the developers. The "inner" toolbar's id is only used internally by customization, so the changes where minimal. 

Assuming this is an hack anyway, and would be replaced by the proper toolbar implementation, I thought was better hiding this information in the implementation instead of making exposed – using "outer" will result in having "outer" also in `toolbar.id` where once we fix this on XBL side having "outer" won't make any sense.