With the new update that introduced Tabs, I would also like to see this feature added.
I don’t mind Tabs, they will be useful in some situations, but in my case when I want to open two or more notes simultaneously most of the time I want to open them side-by-side. It’s much more useful for me than Tabs. Previously I was able to quickly do that using MMB (middle mouse button).
Now I need to use the newly introduced hotkey for “opening to the right” - it’s not a big issue, but using MMB was just a little bit quicker, convenient and just in general felt more natural to me. I would love an option of choosing the default action of MMB.
And why is “opening to the right” more useful to me? I often have multiple notes with various info etc. that I open side-by-side and use as reference when creating a new note that combines the information from the other notes.
This feature request is also kind of similar to this one which talks about default behaviour of mouse clicks in general.