get label rather colonne number in csv output

src/Controller/JobDatasheetController.php

@@ -104,8 +104,14 @@ class JobDatasheetController extends AbstractController
         );
 
         foreach ($results as $line) {
+            $columns = [];
+            foreach($line['columns'] as $column)
+            {
+                preg_match_all('/([\d]+)([\+|\-])/', $column, $record);
+                $columns[] = $job->getColumns()[(int)$record[1][0]-1].$record[2][0];                
+            }
             fputcsv(
-                $fp, array_merge($line['columns'], [$line['frequency']])
+                $fp, array_merge($columns, [$line['frequency']])
             );    
         }