[LVGL] Event handler should receive event object for both "Flow" and "Action" handler types

[mvladic]

Send an event object through event handler connection line:

You can use following functions to get additional info about event:

Event.getCode(<event>)
Event.getCurrentTarget(<event>)
Event.getTarget(<event>)
Event.getUserData(<event>)
Event.getKey(<event>)
Event.getGestureDir(<event>)
Event.getRotaryDiff(<event>)

Also, you can use "Action" for "Handler type" and still get event object:

But, this action must have an Input of type event which will receive this event object:

---

Backward compatibly notice:

Before, events like KEY, GESTURE, ROTARY and VALUE_CHANGED (in case of ButtonMatrix widget) were sending some specific data through event handler connection line (for example GESTURE even was sending gesture direction). Now, this is changed so that these events also sends event object, so for example you need to use Event.getGestureDir(event) to get the direction for GESTURE event.

[mvladic]

Implemented.