I use a Mac, and I've come to pretty much expect anywhere I see a file to be able to drag it to different applications. While you have implemented the file icon in the title bar thing, which is brilliant, I can't drag a file from the sidebar into another app.
For instance, if I have a .html page I want to open in my web browser, I find myself naturally dragging it into my Chrome window, only to find it didn't work.
If you could implement this, I'd love you forever.
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