Missing core labels for depth selection in RealURL management module

[akiessling]

realurl/Classes/View/AdministrationModuleFunction.php

Line 82 in 8fd0036

0 => $GLOBALS['LANG']->sL('LLL:EXT:lang/locallang_core.php:labels.depth_0'),

The labels for selecting the depth of cache and mapping information are missing in TYPO3 8.7, they need to be referenced from lang/Resources/Private/Language/locallang_core.xlf