If the plugin's size needs allow it, set plugin into "small" mode.
That alignment stuff in the panel multi-row mode seems to be buggy.
I tried to get it working as good as possible, but there are some weird,
unexpected things happening with some configurations.
Clean up formatting of this function and make the eye movement independent.
The actual change is subtracting GTK_WIDGET(widget)->allocation.x from nx
and GTK_WIDGET(widget)->allocation.y from ny.
