I really like how easily you can customize the right-click menu and add your own shortcuts. But a feature I think would be really nice would be to have submenu items within the right-click menu. And so you can group shortcuts within a submenu.
For example, when you right click the mouse you would see something like this:
Menu1>
Menu2>

Anything with a ">" indicates a submenu. And then when you click on Menu1, you would see its submenu.

Menu1 >
shortcut1
shortcut2
Menu2 >


regards,
Phong