Feature request: Input focus follows mouse

[LookoutHill]

Description of the new feature/enhancement

Focus follows mouse allows one to direct input into the exposed terminal tab while another window is selected so long as the mouse pointer is positioned anywhere over the Windows Terminal window.

This will reduce extra mouse clicks and make switching input focus more streamlined.

Proposed technical implementation details (optional)

Given that another window is selected and active, focus follows mouse allows one to direct input into the exposed terminal tab when the mouse pointer is positioned anywhere over the Windows Terminal window. One does not have to click on the Windows Terminal window to active input focus.

[DHowett-MSFT]

Yeah, this is a neat feature request. I'm marking it up for terminal/UI/backlog and that it needs a specification 😄

[zadjii-msft]

Huh, so this is different from #6459 (which was added in Windows Terminal Preview v1.7.572.0). For this, we just need to focus the window when the get a mouse hover event, even when the Terminal isn't focused. I suppose a "window"/global setting for "focusOnHover":bool would be easy enough (so long as we get the right window message even when inactive. Don't think we need a whole spec for this one.