As far as I can guess from reading the SCN discussions on the topic, the layout doesn't work for master/detail template but we get an error:
Are there plans for this to work?
On a side note, SAP is basically telling us that this is the future, that this is what we are supposed to use, but then I waste a lot of time trying to guess what I did wrong with the installation when it's actually an unsupported feature that throws this popup like it's some kind of error. This is not what a finished product looks like so I have to ask if Eclipse still the recommended IDE for SAPUI5?
PS: Yes I'm annoyed that I wasted about 6 hours of my weekend checking and re-checking the installation to try to find what I had done wrong. If it's not supported catch the exception and throw a decent "error" message.