override theme option

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

@@ -30,6 +30,7 @@
     <string name="release_fetch_button_cancel">Cancel</string>
 
     <!-- GeometryDashActivity strings -->
+    <string name="message_box_cancel">Cancel</string>
     <string name="message_box_accept">OK</string>
 
     <!-- SettingsActivity strings -->
@@ -46,6 +47,12 @@
     <string name="preferences_copy_external_button">Copy external files directory</string>
     <string name="preferences_open_file_manager">Open file manager</string>
 
+    <string name="preference_theme_name">Theme</string>
+    <string name="preference_theme_select">Select theme</string>
+    <string name="preference_theme_default">System default</string>
+    <string name="preference_theme_light">Light</string>
+    <string name="preference_theme_dark">Dark</string>
+
     <string name="preference_category_updater">Updates</string>
     <string name="preference_update_automatically_name">Enable automatic updates</string>
     <string name="preference_release_channel_name">Use nightly release channel</string>