Animation stories changes: 3. Add dataset!

[#47025017]
Correct base activity for animation stories

[#47025017]
The correct diff for animation stories activity

[#47025017]
Fix misuse of coffeescript internal rep "_arg"
Add support for AnimationPanes and animations

[#47025105]
EmptyPane
Allow GraphPanes to have animations

[#47025105]
Expected output for animations

[#47025105]