DEV 16488: Reviewing updateQuestionOrder usage (#1532)

• Removed language from Question::updateQuestionOrder parameters.
  The method now uses the survey base language to work.
• Changed how order is handled in actionUpdateQuestion (database.php)
• Removed call to Question::updateQuestionOrder in actionInsertCopyQuestion() (database.php), because order was already handled.
• Updated shiftOrderQuestions (common_helper.php) for not using language inside of it.
  This function is not used anymore in Limesurvey's codebase, but still it might be used by others, or in the future.
• Calls to Question::updateSortOrder where replaced by Question::updateQuestionOrder for consistency.
  updateSortOrder is not removed from the codebase, just in case.