In nvim, how can I I make it so the mouse will select a split, but not select any text. I only want the mouse to control window focus

Question

I want to be able to toggle on and off this potential feature too. Sometimes, I don't want to change the cursor position, but I want to use my mouse to select a split to focus on.

I tried disabling mouse and fiddling with in by typing :h mouse in nvim, but nothing I could find in the docks helped