Avoid showing the alert option in the drop down

Only show it when there really is an alert table to see.

extensions/ql-vscode/src/view/result-tables.tsx

@@ -106,7 +106,9 @@ export class ResultTables
   }
 
   private getResultSetNames(): string[] {
-    return this.props.parsedResultSets.resultSetNames.concat([ALERTS_TABLE_NAME]);
+    return this.props.interpretation
+      ? this.props.parsedResultSets.resultSetNames.concat([ALERTS_TABLE_NAME])
+      : this.props.parsedResultSets.resultSetNames;
   }
 
   constructor(props: ResultTablesProps) {