Clip text out of plot borders when plotting the cell ids.

src/@deproj/add_plot_id.m

@@ -12,7 +12,8 @@ function hts = add_plot_id( obj, ax )
             center(1), center(2), center(3) + 0.5, ...
             num2str( o.id ), ...
             'HorizontalAlignment', 'center', ...
-            'VerticalAlignment', 'middle' );
+            'VerticalAlignment', 'middle', ...
+            'Clipping', 'on' );
     end
 end