Hparams: Fix regression in column selector. (tensorflow#6811)

Ensure the following properties are passed to the column selector from
the data table:

```
    [numColumnsLoaded]="numColumnsLoaded"
    [hasMoreColumnsToLoad]="hasMoreColumnsToLoad"
    (loadAllColumns)="loadAllColumns.emit()"
```

These were accidentally removed in tensorflow#6799. Caught by internal tests.

tensorboard/webapp/widgets/data_table/data_table_component.ng.html

@@ -27,7 +27,10 @@
 <ng-template #columnSelectorModalTemplate>
   <tb-data-table-column-selector-component
     [selectableColumns]="selectableColumns"
+    [numColumnsLoaded]="numColumnsLoaded"
+    [hasMoreColumnsToLoad]="hasMoreColumnsToLoad"
     (columnSelected)="onColumnAdded($event)"
+    (loadAllColumns)="loadAllColumns.emit()"
   ></tb-data-table-column-selector-component>
 </ng-template>