This fixes some issues with Izotope Ozone 9:
- Resizing would stutter, and could leave the view in an inconsistent
  state.
- Closing and reopening the view after resizing would display black bars
  around the editor view.

The root of the problem was that the call to Component::setSize() inside
the resizeView call checked whether the plugin supported resizing. If
not, it would force the embedded view back to the current size. This
behaviour is incorrect - if the plugin requests a resize via resizeView,
the new size should be applied whether or not the plugin "supports
resizing".