add a couple strings for dark theme, even if not translated

app/src/main/res/values-it/strings.xml

@@ -34,6 +34,10 @@
     <string name="follow_us">Seguici:</string>
     <string name="copyright">v %1$s\nCopyright © Simple Mobile Tools %2$d</string>
 
+    <!-- Settings -->
+    <string name="settings">Impostazioni</string>
+    <string name="dark_theme">Dark theme</string>
+
     <!--License-->
     <string name="notice">Questa app usa le seguenti librerie di terze parti per semplificarmi la vita. Grazie.</string>
     <string name="third_party_licences">Licenze di terze parti</string>

app/src/main/res/values-ja/strings.xml

@@ -34,6 +34,10 @@
     <string name="follow_us">フォローしてください:</string>
     <string name="copyright">v %1$s\nCopyright © Simple Mobile Tools %2$d</string>
 
+    <!-- Settings -->
+    <string name="settings">設定</string>
+    <string name="dark_theme">Dark theme</string>
+
     <!--License-->
     <string name="notice">このアプリは、私の人生を容易にするために、次のサードパーティのライブラリーを使用しています。 ありがとうございます。</string>
     <string name="third_party_licences">サードパーティー ライセンス</string>

app/src/main/res/values-sv/strings.xml

@@ -34,6 +34,10 @@
     <string name="follow_us">Följ oss:</string>
     <string name="copyright">v %1$s\nCopyright © Simple Mobile Tools %2$d</string>
 
+    <!-- Settings -->
+    <string name="settings">Inställningar</string>
+    <string name="dark_theme">Dark theme</string>
+
     <!--License-->
     <string name="notice">Denna app använder följande tredjepartsbibliotek för att göra mitt liv enklare. Tack.</string>
     <string name="third_party_licences">Tredjepartslicenser</string>

app/src/main/res/values/strings.xml

@@ -35,6 +35,10 @@
     <string name="follow_us">Follow us:</string>
     <string name="copyright">v %1$s\nCopyright © Simple Mobile Tools %2$d</string>
 
+    <!-- Settings -->
+    <string name="settings">Settings</string>
+    <string name="dark_theme">Dark theme</string>
+
     <!--License-->
     <string name="notice">This app uses the following third party libraries to make my life easier. Thank you.</string>
     <string name="third_party_licences">Third party licences</string>
@@ -52,8 +56,4 @@
         <item quantity="one">1 event deleted</item>
         <item quantity="other">%1$d events deleted</item>
     </plurals>
-
-    <!-- Settings -->
-    <string name="settings">Settings</string>
-    <string name="dark_theme">Dark theme</string>
 </resources>