Unreal Engine 4.7 Preview

So I create an Actor BP and dragged it out into my scene. I then added a spline via component menu. so far. Went to edit spling and it is not editable in scene. I want to be able to edit spline in scene too. For example, I want to literally BP out a city block and I want to be able to add spline components to it and edit them in level view port. When I like it , I want to create a new BP from . Then I might want to edit spline again and apply it to BP asset or create a new one. Will be possible in future? Thanks!

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