Adds ValueVectorNull, ValueMapNull, ValueMapIntKeyNull global variables.
closed #5160: Dispatch a custom event after an animation frame is displayed
closed #5160: Updates ActionTest
issue #5160: Don't use static variables, use member variables
issue #5160: Updates actiontest
Merge pull request #6715 from dumganhar/iss5160-animation-notification

closed #5160: Dispatch a custom event after an animation frame is displayed