Added data source identifier to general property selection form for data-explorer
<mat-select [ngModel]="selectedProperty" (selectionChange)="triggerSelectedProperty($event.value)" [compareWith]="compare">
<mat-option *ngFor="let column of availableProperties" [value]="column" style="background-color: #FFFFFF">
<b>{{column.runtimeName}}</b>
- {{'(' +(column.aggregation ? column.aggregation + ', ': '') + column.measure +')'}}
+ {{'(' +(column.aggregation ? column.aggregation + ', ': '') + column.measure + ' #' + (column.sourceIndex + 1).toString() + ')'}}
</mat-option>
</mat-select>
</mat-form-field>
