Major update

too lazy to describe

xmpd-gui/src/windows/error.rs

@@ -17,4 +17,7 @@ impl Window for ErrorW {
         ui.label("Hello from other window!");
         Ok(()) 
     }
+    fn set_value<V>(&mut self, k: String, v: Box<V>) where Self: Sized {
+        
+    }
 }