Add new rubber band zoom
Please add a new rubber band zoom. This will supplement our current rubber band zoom, and will be the default. Make it so that you chose a corner of the zoom, and then rubber band draw the rectangle with the current view's aspect ratio. Change the current zoom to be active with a SHFT or CTRL key.
Ask me for a drawing of what I want, if desired.
As per Utkarsh, targeting 5.7.