fix document naming and file dialogs preset, add touch scroll, flip thumbnail, scroll gesture and wheel for sidebar

engine/node_color_quad.h

@@ -7,6 +7,7 @@ class NodeColorQuad : public NodeBorder
     bool dragging = false;
 public:
     glm::vec2 m_value;
+    glm::vec2 m_old_value;
     std::function<void(Node* target, glm::vec2 value)> on_value_changed;
     virtual Node* clone_instantiate() const override;
     virtual void clone_finalize(Node* dest) const override;