Add scrollbars as need for config panel

Author: Stefan Hahmann

src/main/java/org/mastodon/tracking/mamut/trackmate/wizard/descriptors/StarDistDetectorDescriptor.java

@@ -157,8 +157,8 @@ public Component getListCellRendererComponent(
 
 		JLabel modelTypeLabel = new JLabel( "Model type:" );
 		modelTypeLabel.setFont( contentPanel.getFont().deriveFont( contentPanel.getFont().getSize2D() - 2f ) );
-		contentPanel.add( modelTypeLabel, "align left, wrap" );
-		contentPanel.add( modelTypeSelection, "align left, grow" );
+		contentPanel.add( modelTypeLabel, "align left, growx" );
+		contentPanel.add( modelTypeSelection, "align left, wmax 250, growx, wrap" );
 
 		probThreshold = new JSpinner( new SpinnerNumberModel( 0.0, 0.0, 1.0, 0.1 ) );
 		probThreshold.setFont( contentPanel.getFont().deriveFont( contentPanel.getFont().getSize2D() - 2f ) );