Both the ability to drag and drop onto the project sidebar and a “Move To Project” command are on my list, just haven’t implemented them yet.
Hum… I see what you mean. I think the answer might be for me to implement “Reveal in Outline” (which is on my list). That command will cancel the current search and focused project and will scroll to the item that you previously had selected, only in the full outline.
So you would navigate to the project you were interested in using View > Go to Project (Command-L) and then choose Reveal in Outline. Then you could insert your project. It’s a little round about, maybe there’s a better option. At the same time I’m hesitant to add a whole new UI concept to scroll to a project instead of to focus on it. I guess in a normal text editor I would just go to home (since you always see everything in normal editor) and then do a normal text search to find the project. So there’s that option too.