This file "escaped" during the code reorganization. I have no clue what

I did wrong.  Anyway, now that it's back one can configure TubeCouplers
again.

swing/src/net/sf/openrocket/gui/configdialog/ThicknessRingComponentConfig.java

@@ -0,0 +1,34 @@
+package net.sf.openrocket.gui.configdialog;
+
+
+import javax.swing.JPanel;
+
+import net.sf.openrocket.document.OpenRocketDocument;
+import net.sf.openrocket.l10n.Translator;
+import net.sf.openrocket.rocketcomponent.RocketComponent;
+import net.sf.openrocket.startup.Application;
+
+
+
+public class ThicknessRingComponentConfig extends RingComponentConfig {
+	private static final Translator trans = Application.getTranslator();
+	
+	public ThicknessRingComponentConfig(OpenRocketDocument d, RocketComponent c) {
+		super(d, c);
+		
+		JPanel tab;
+		
+		//// Outer diameter:
+		//// Inner diameter:
+		//// Wall thickness:
+		//// Length:
+		tab = generalTab(trans.get("ThicknessRingCompCfg.tab.Outerdiam"),
+				trans.get("ThicknessRingCompCfg.tab.Innerdiam"),
+				trans.get("ThicknessRingCompCfg.tab.Wallthickness"), trans.get("ThicknessRingCompCfg.tab.Length"));
+		//// General and General properties
+		tabbedPane.insertTab(trans.get("ThicknessRingCompCfg.tab.General"), null, tab,
+				trans.get("ThicknessRingCompCfg.tab.Generalprop"), 0);
+		tabbedPane.setSelectedIndex(0);
+	}
+	
+}