BIS-165 / SP-286: Exporting "for batch update" is very slow

...ient/application/ui/TypedTableGridColumnDefinitionUI.java

...ation/ui/columns/specific/GridCustomColumnDefinition.java

...penbis/generic/client/web/server/CommonClientService.java

...c/client/web/server/resultset/CachedResultSetManager.java

.../cisd/openbis/generic/shared/basic/IColumnDefinition.java

...eric/shared/basic/dto/TypedTableGridColumnDefinition.java

...ient/web/server/resultset/CachedResultSetManagerTest.java