update psf size when switching fron 3d to 2d

src/src/eigenpsf/SettingsDialog.java

@@ -248,6 +248,10 @@ public class SettingsDialog extends JDialog implements ActionListener, KeyListen
 			Params.thresholdDetection = spnThreshold.get();
 			Params.NeigenElements = spnNbEigen.get();
 			Params.dim = bn2D.isSelected() ? 2 : 3;
+			if (Params.dim == 2){
+				Params.psf_visible_width[2]=1;
+				spnPSFZ.set(Params.psf_visible_width[2]);
+			}
 		} catch (Exception ex) {
 		}
 	}