Project-wide find/replace

A feature I use a lot in Atom (and I believe exists in Sublime and most IDEs) is project-wide find and replace. Typically I see it triggered with a right-click on the project/folder name in the sidebar but I could also see a check box in the existing find UI.

Results in Atom show up as a tab in the editor area, but I'm not sure what the best design for that would be.

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