Add new option "activationDelay" + new function parameters + update documentation

[antoineguillou]

Add new option "activationDelay".

This option adds a delay (in milliseconds) before really opening submenu to prevent flickering submenus when moving cursor quickly between rows. If this option is not set, no delay is applied.

Add parameters to activate & deactivate functions

• Activate : add previously activated row as a second parameter if any.
• Deactivate : add next activated row as a second parameter if any.

[andrnag]

It's really helpful. Thanks!

[Matth2772]

Thanks!

[oguzhanaslan]

Thanks. Good job.

[thenickcox]

Is this going to get merged? I also think it would be helpful to be able to add logic to this based on the element. Like, I want a delay on certain menu items that contain an animation, but not on others.