Easing: Fixed small typo in easing demo
Dialog: Updating demo style based on changes to theme and demo CSS

Fixes #10693
Closes #1385
Build: Fix typo

Amend "Build: Remove manifest files; move metadata to source files"
b5f1ffdea4c3c4b41936e56d4cb23ca8acb2aaa8

Ref gh-1379
Effects: Rewrite

1. Introduces a set of helper methods to easily create and define new effects.
2. Uses clip animations and placeholders instead of wrappers for clip effects.
3. Ensures all animations are detectable as animated

Fixes #10599
Fixes #9477
Fixes #9257
Fixes #9066
Fixes #8867
Fixes #8671
Fixes #8505
Fixes #7885
Fixes #7041

Closes gh-1017