fix motif examples: struct_oper_id/operatorName now must be specified

src/viewer/index.html

@@ -360,8 +360,8 @@
                         kind: 'motif',
                         assemblyId: '1',
                         targets: [
-                            { label_asym_id: 'A', label_seq_id: 61 },
-                            { label_asym_id: 'A', label_seq_id: 69 },
+                            { label_asym_id: 'A', label_seq_id: 61, operatorName: 'ASM_1' },
+                            { label_asym_id: 'A', label_seq_id: 69, operatorName: 'ASM_1' },
                             { label_asym_id: 'A', label_seq_id: 87, operatorName: 'ASM_4' }
                         ],
                     }
@@ -373,8 +373,8 @@
                         kind: 'motif',
                         assemblyId: '1',
                         targets: [
-                            { label_asym_id: 'A', label_seq_id: 61 },
-                            { label_asym_id: 'A', label_seq_id: 69 },
+                            { label_asym_id: 'A', label_seq_id: 61, struct_oper_id: '1' },
+                            { label_asym_id: 'A', label_seq_id: 69, struct_oper_id: '1' },
                             { label_asym_id: 'A', label_seq_id: 87, struct_oper_id: '4' }
                         ],
                     }