File not found in FE.type=file: Show more clearly that the pathfilename is...

File not found in FE.type=file: Show more clearly that the pathfilename is only shown when ShowDebugInfo=on.

extension/Source/core/AbstractBuildForm.php

@@ -3086,11 +3086,13 @@ abstract class AbstractBuildForm {
                 $link = new Link($this->sip, $this->dbIndexData);
                 $value = $link->renderLink('s|M:file|d|F:' . $value . '|' . $this->evaluate->parse($formElement[FE_FILE_DOWNLOAD_BUTTON]));
             } else {
+
+                $msg = "Already uploaded file not found";
                 // In case debugging is off: showing download button means 'never show the real pathfilename'
-                if (!$this->showDebugInfoFlag) {
-                    $value = '';
+                if ($this->showDebugInfoFlag) {
+                    $msg .= ' ShowDebugInfo=on >> Missing file is: ' . $value;
                 }
-                $value .= " - file not found, please check field 'value'";
+                $value = $msg;
             }
         }