is it possible to add submenu in mxgraph editor sidebar ? I need many shapes and i wont be able to find them if i cant make submenu Example :
-General :
--Circles :
---all circles shapes here-
--Squares :
---Rounded Squares :
-all rounded squares shapes here-
--Arrows -all arrrows here-
https://jgraph.github.io/mxgraph/javascript/examples/grapheditor/www/index.html
https://github.com/jgraph/mxgraph/blob/master/javascript/examples/grapheditor/www/js/Sidebar.js