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

engine/image.h

@@ -19,6 +19,7 @@ public:
         comp = 4;
         m_data = std::make_unique<uint8_t[]>(size());
     }
+    void flip();
     void create() { m_data = std::make_unique<uint8_t[]>(size()); }
 };