Merge pull request #6792 from IgniteUI/masenov/docs-grid-autogenerate-82x

docs(grid): Add remark for autoGenerate property

Author: kdinev

projects/igniteui-angular/src/lib/grids/grid-base.component.ts

@@ -296,6 +296,8 @@ export abstract class IgxGridBaseComponent extends DisplayDensityBase implements
     /**
      * An @Input property that autogenerates the `IgxGridComponent` columns.
      * The default value is false.
+     * @remarks
+     * When set to true, it will override all columns declared through code or in markup.
      * ```html
      * <igx-grid [data]="Data" [autoGenerate]="true"></igx-grid>
      * ```