Request: Don't clear text selection when foregrounding Hyper windows

Is your feature request related to a problem? Please describe.

I often highlight part of my terminal screen, temporarily switch to a different terminal window or even another application, then switch back. But every time I do this, Hyper forcibly removes the text selection highlight. Other emulators like Terminal.app don't do this.

Describe the solution you'd like

Please provide a boolean option that controls whether to reset text selection when a click event is the action that foregrounds a formerly background Hyper window.

Ideally default the option to not reset the text selection, but I care more about having the option, and documenting the option in the default config, than what we decide the default behavior to be.

Start by locating the click-handling path that foregrounds a background Hyper window and the default configuration exposed to users. Trace where text selection is reset, then define the boolean option and verify that its documented default controls this behavior without affecting other selection handling.