Issue #1189 Sort imports to have same order always

libsrc/ffdec_lib/src/com/jpexs/decompiler/graph/DottedChain.java

@@ -28,7 +28,7 @@ import java.util.List;
  *
  * @author JPEXS
  */
-public class DottedChain implements Serializable {
+public class DottedChain implements Serializable, Comparable<DottedChain> {
 
     public static final DottedChain EMPTY = new DottedChain(true);
 
@@ -278,4 +278,9 @@ public class DottedChain implements Serializable {
 
         return true;
     }
+
+    @Override
+    public int compareTo(DottedChain o) {
+        return toRawString().compareTo(o.toRawString());
+    }
 }