[UMG] Allow Verse Field event triggering inside animations

Allow Verse Field event triggering inside animations, so that we can have events fire at specific times dictated inside an animation.

For example, when levelling up a player, I want to fire a UMG animation where the number moves in the center of the screen, shakes, grows, then the level number goes up. If I wanted to do that now, I have to sleep in verse and count the time manually.