Improve animation overlay functionality

[KateKeeley]

Add ability to create your own styled title/paragraph overlay templates and ability to copy and paste text overlays so you can easily have multiple overlays with the same style throughout the animation

[ChelseaRozek]

I'm still not seeing this ability in Pro 2.9.0. I hope it can be added in. In my use case, I style and position text that has the data's source date for each keyframe. Would be nice if I could copy it to every keyframe and just change the text to the proper date instead of starting from scratch on each of the 20 or so keyframes.