sync theme

Signed-off-by: 21pages <pages21@163.com>

src/ui/cm.rs

@@ -47,6 +47,10 @@ impl InvokeUiCM for SciterHandler {
     fn new_message(&self, id: i32, text: String) {
         self.call("newMessage", &make_args!(id, text));
     }
+
+    fn change_theme(&self, _dark: bool) {
+        // TODO
+    }
 }
 
 impl SciterHandler {