.onEnd attribute multiple calling

[oleszczyk]

Steps to reproduce

1. assign any notification action to '.onEnd' attribute
2. move and stop slider many times
3. notice that now single move-stop event fire many notifications (as many notifications as many moves have been proceeded)

Expected behaviour

Single move-stop event should call only one '.onEnd' directive

Actual behaviour

Single move-stop event calls '.onEnd' as many times as many moves have been proceeded from page has been loaded.

[ValentinH]

cc @daniela-mateescu

[ValentinH]

@oleszczyk 6.2.1 should fix your issue! ;) Tell me if it's OK please 😄

[ValentinH]

Note for myself: the fix is probably fine but a unit test covering this issue should be added...