Deploy web Studio / deploy (push) Successful in 3m9s
A press with the middle (or any other non-left) mouse button never reaches the Studio's drag, place or select handlers: dragging pans the view even on a selected object or while placing, and a click selects nothing. A middle click no longer starts the browser's autoscroll. check_studio covers a middle-drag on the selected truck (it stays put, the view moves), a middle click on another object (the selection is kept), and a middle-drag while placing (nothing is placed).