Bug fixes and added icon overlay for immunity management.

src/com/gpl/rpg/atcontentstudio/ui/OverlayIcon.java

@@ -0,0 +1,35 @@
+package com.gpl.rpg.atcontentstudio.ui;
+
+import java.awt.Component;
+import java.awt.Graphics;
+import java.awt.Image;
+
+import javax.swing.Icon;
+
+public class OverlayIcon implements Icon {
+	
+	private Image background;
+	private Image overlay;
+	
+	public OverlayIcon(Image background, Image overlay) {
+		this.background = background;
+		this.overlay = overlay;
+	}
+	
+	@Override
+	public void paintIcon(Component c, Graphics g, int x, int y) {
+		g.drawImage(background, x, y, null);
+		g.drawImage(overlay, x, y, null);
+	}
+
+	@Override
+	public int getIconWidth() {
+		return Math.max(background.getWidth(null), overlay.getWidth(null));
+	}
+
+	@Override
+	public int getIconHeight() {
+		return Math.max(background.getHeight(null), overlay.getHeight(null));
+	}
+
+}