fix(nocodb): rollback previous change + add comment

packages/nocodb-nest/src/models/Model.ts

@@ -78,12 +78,15 @@ export default class Model implements TableType {
     return this.columns?.filter((c) => c.pk);
   }
 
+  // If there is no column marked as display value,
+  // we are getting the immediate next column to pk as display value
+  // or the first column(if pk is the last column).
   public get displayValue(): Column {
     if (!this.columns) return null;
     const pCol = this.columns?.find((c) => c.pv);
     if (pCol) return pCol;
     const pkIndex = this.columns.indexOf(this.primaryKey);
-    if (pkIndex < this.columns.length - 1) return this.columns[pkIndex];
+    if (pkIndex < this.columns.length - 1) return this.columns[pkIndex + 1];
     return this.columns[0];
   }