Designer cannot interact with controls outside clipped window canvas

In the window designer, a control can become unreachable when it is positioned outside the window's visible client area. For example, a button placed to the right of a larger window is clipped after the window is resized smaller. The control still exists and can be selected from the designer context menu, but it cannot be clicked or dragged back onto the window with the mouse.

Expected behaviour: Studio should provide a design-time way to select and drag off-window controls back into the visible window area without changing how the actual app preview is clipped at runtime.