Add more customization options

[FZ-Iskandar]

Hi,

Thank you for the components they are very convenient.

Still, it would be even better if you leaved us more freedom to do some tweaks here and there...

If you could emit some events here and there to be able to modify some default functionality and the possibility to set classes or attributes to the dinamically generated elements such as dialogs, menus, lists etc. it would be perfect. Maybe even drop in some useful callbacks...

Please consider it when you have the time.

Again, Thank you!