LMS-819 functionality implemented but no proper GUI layout.

...enbis/generic/client/web/client/ICommonClientService.java

.../generic/client/web/client/ICommonClientServiceAsync.java

.../client/application/ui/data/AbstractExternalDataGrid.java

...eneric/client/web/client/dto/DataSetUploadParameters.java

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

...ch/systemsx/cisd/openbis/generic/server/CommonServer.java

...temsx/cisd/openbis/generic/server/CommonServerLogger.java

...openbis/generic/server/business/bo/ExternalDataTable.java

...penbis/generic/server/business/bo/IExternalDataTable.java

...h/systemsx/cisd/openbis/generic/shared/ICommonServer.java

...cisd/openbis/generic/shared/dto/DataSetUploadContext.java

...ystemsx/cisd/openbis/generic/server/CommonServerTest.java

...bis/generic/server/business/bo/ExternalDataTableTest.java

...x/cisd/openbis/generic/shared/ICommonServer.java.expected