message: Show idle cursor if image can't be panned
diff: @@ -25,10 +25,13 @@ impl image_pane::Renderer for Renderer {
  {
  if state.is_cursor_clicked() {
  MouseCursor::Grabbing
  - } else if is_mouse_over {
  + } else if is_mouse_over
  + && (image_bounds.width > bounds.width
  + || image_bounds.height > bounds.height)
  + {
  MouseCursor::Grab
  } else {
  - MouseCursor::OutOfBounds
  + MouseCursor::Idle
  }
  },
  )
  