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

engine/node_dialog_open.cpp

@@ -52,6 +52,7 @@ void NodeDialogOpen::init_controls()
             image_tex->tex.create(thumb);
             selected_path = target->m_path;
             selected_file = target->m_file_name;
+            selected_name = selected_file.substr(0, selected_file.length() - 5);
             if (current)
                 current->m_selected = false;
             current = target;
@@ -191,4 +192,4 @@ void NodeDialogNewDoc::init_controls()
 void NodeDialogNewDoc::loaded()
 {
 
-}
+}