Windows: Make sure currentModifiers are cleared after a pen up event

modules/juce_gui_basics/native/juce_win32_Windowing.cpp

@@ -2558,6 +2558,7 @@ private:
         else if (isUp || ! (pInfoFlags & POINTER_FLAG_INCONTACT))
         {
             modsToSend = modsToSend.withoutMouseButtons();
+            currentModifiers = currentModifiers.withoutMouseButtons();
         }
 
         handleMouseEvent (MouseInputSource::InputSourceType::pen, pos, modsToSend, pressure,