Activate to enable allout icon graphics wherever allout mode is active.
Also enable `allout-auto-activation' for this to take effect upon
visiting an outline.
When this is set you can disable allout widgets in select files
by setting `allout-widgets-mode-inhibit'
Instead of setting `allout-widgets-auto-activation' you can
explicitly invoke `allout-widgets-mode' in allout buffers where
you want allout widgets operation.
See `allout-widgets-mode' for allout widgets mode features.