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Added  a fix to properly handle non-animated popups converting into animated popups.

Enyo-DCO-1.1-Signed-off-by: Blake Stephens <blake.stephens@lge.com>
Scrim when hiding is now GPU accelerated, requiring no paints.
To accelerate showing, scrim needs to be re-written.

Enyo-DCO-1.1-Signed-off-by: Blake Stephens <blake.stephens@lge.com>
Refactored Popup to be cleaner, easier to use, removed crufty code, use CSS transforms/transitions, and make better use of standard `show`/`hide` methods.

Enyo-DCO-1.1-Signed-off-by: Blake Stephens <blake.stephens@lge.com>
Add cleanup and docs update.

Enyo-DCO-1.1-Signed-off-by: Blake Stephens <blake.stephens@lge.com>
showDirect & hideDirect don't impose direct for future show/hides, but only for that one method call.

Enyo-DCO-1.1-Signed-off-by: Blake Stephens <blake.stephens@lge.com>
Merge pull request #1693 from enyojs/BHV-15361-blakestephens

BHV-15361: Refactor Popup to work more reliably.

Reviewed-By: Art Dahm (art.dahm@lge.com)
Integrated-By: Ryan Duffy (ryan.duffy@lge.com)