Sublime Text 3: do not close tabs automatically

When you single-click on a file in the sidebar, Sublime displays it in a "temp" view that is overwritten the next time you single-click on a file. To open a file in a "permanent" tab that stays open even when other files are opened, you simply need to double-click on the file in the sidebar.

A more direct solution that I find mildly preferable, at least until I can retrain myself to double-click when I want a tab to stay open:

In the Settings, set preview_on_click to false.

This is not quite what I want since it all it does is disable the behavior to open a preview tab on single click -- thereby forcing the user to always double click. But perhaps by working this way for a week or so I will be able to retrain my ingrained assumptions and can go back to the default behavior.