Not sure why it is necessary to hold the Middle mouse button when you want to column select something with the mouse. The other option is to use right mouse button while you are holding shift. But if you are holding the right mouse button and dragging why not just let that be the column select? Holding right mouse and dragging does nothing else right now. Why require the middle mouse?
I am also used to visual studio which uses just holding ALT with left mouse button for this. Would be nice if it were possible to enable that same functionality.