Ensure pinnwand module palette exposes imgSize reliably

contao/config/config.php

@@ -9,3 +9,5 @@ $GLOBALS['BE_MOD']['content']['pinnwand'] = [
 ];
 
 $GLOBALS['TL_MODELS']['tl_pinnwand'] = PinboardModel::class;
+
+$GLOBALS['TL_DCA']['tl_module']['palettes']['pinnwand'] = '{title_legend},name,headline,type;{image_legend},imgSize;{protected_legend:hide},protected;{expert_legend:hide},guests,cssID';