core: add additional headers for Popup.cpp and InputMethodRelay.hpp (#4909)

src/managers/input/InputMethodRelay.hpp

@@ -1,5 +1,6 @@
 #pragma once
 
+#include <list>
 #include "../../defines.hpp"
 #include "../../helpers/WLClasses.hpp"
 
@@ -50,4 +51,4 @@ class CInputMethodRelay {
     friend class CHyprRenderer;
     friend class CInputManager;
     friend class CTextInputV1ProtocolManager;
-};
+};