B15729 textelement auto multiline

extension/Classes/Core/AbstractBuildForm.php

@@ -1513,6 +1513,11 @@ abstract class AbstractBuildForm {
             $formElement[FE_INPUT_TYPE] = 'number';
         }
 
+        // when size empty but value contains \n then set auto multi line
+        if (strpos($value, "\n") == true && empty($formElement[FE_SIZE])) {
+            $formElement[FE_SIZE]='50,2';
+        }
+
         // Check for input type 'textarea'. Possible notation: a) '', b) '<width>', c) '<width>,<height>', d) '<width>,<min-height>,<max-height>'
         $colsRows = explode(',', $formElement[FE_SIZE], 3);