By default, the atom tree-view for browsing files/directories will open a file or collapse / expand a directory listing just by single-clicking on the entry.
This package forces the user to double click on a file to open it, or on a directory to expand/collapse it. This effectively turns a single-click into just selecting the item clicked on, which is the default behavior in most editors.
To install:
apm install double-click-tree-view
Big thanks to h2so5 for writing the original chary-tree-view that this has been forked from.