[BUGFIX] Add missing label

Resources/Private/Language/de.locallang_db.xlf

@@ -611,6 +611,10 @@
 				<source><![CDATA[Accept Button]]></source>
 				<target><![CDATA[Akzeptieren-Button]]></target>
 			</trans-unit>
+			<trans-unit id="tx_sgcookieoptin_domain_model_optin.palette.banner_accept_essential_button" approved="yes">
+				<source><![CDATA[Essential Button]]></source>
+				<target><![CDATA[Essentiel-Button]]></target>
+			</trans-unit>
 			<trans-unit id="tx_sgcookieoptin_domain_model_optin.palette.multidomain_settings">
 				<source><![CDATA[Multidomain Settings]]></source>
 				<target><![CDATA[Multidomain-Einstellungen]]></target>

Resources/Private/Language/locallang_db.xlf

@@ -96,6 +96,9 @@
 			<trans-unit id="tx_sgcookieoptin_domain_model_optin.banner_color_button_accept_essential_text" approved="yes">
 				<source><![CDATA[Text Color Essential Button]]></source>
 			</trans-unit>
+			<trans-unit id="tx_sgcookieoptin_domain_model_optin.palette.banner_accept_essential_button" approved="yes">
+				<source><![CDATA[Essential Button]]></source>
+			</trans-unit>
 			<trans-unit id="tx_sgcookieoptin_domain_model_optin.banner_button_settings_text">
 				<source><![CDATA[Settings Button Text]]></source>
 			</trans-unit>