CB-4779 mark rows and columns getters as computed values (#2430)

* CB-4779 mark rows and columns getters as computed values

* CB-4779 wrap keys in computed

* CB-4779 remove unused import

---------

Co-authored-by: Evgenia Bezborodova <139753579+EvgeniaBzzz@users.noreply.github.com>

webapp/packages/plugin-data-viewer/src/DatabaseDataModel/Actions/ResultSet/ResultSetViewAction.ts

@@ -5,7 +5,7 @@
  * Licensed under the Apache License, Version 2.0.
  * you may not use this file except in compliance with the License.
  */
-import { action, makeObservable, observable } from 'mobx';
+import { action, computed, makeObservable, observable } from 'mobx';
 
 import { DataTypeLogicalOperation, ResultDataFormat, SqlResultColumn } from '@cloudbeaver/core-sdk';
 
@@ -55,6 +55,10 @@ export class ResultSetViewAction extends DatabaseDataAction<any, IDatabaseResult
     makeObservable<this, 'columnsOrder'>(this, {
       columnsOrder: observable,
       setColumnOrder: action,
+      rows: computed,
+      rowKeys: computed,
+      columns: computed,
+      columnKeys: computed,
     });
   }