implementing color wheel and new color picker

engine/canvas.cpp

@@ -1324,6 +1324,7 @@ void ui::Canvas::project_open_thread(std::string file_path)
         l.destroy();
     m_layers.clear();
     m_order.clear();
+    resize(m_width, m_height);
     App::I.async_end();
 
     std::vector<int> tmp_order;