* Bidirectional improvements for core classes
* Fix Control Panel table text direction
* Switch to logical properties
* Add -webkit-margin-* properties
* Improve backward compatibility
* Use supports CSS at-rule for fallback
* Tiddler controls, alert, TOC update.
* tc-tree & testcase update
* .tc-sidebar-scrollable use new syntax
* Snow white use standard value
* Update divider
* Avoid negative logic
* Remove :dir rules at the moment
* Use property procedures
* Add change note
* Update blockquote
* Update unfold banner
* Update tiddlerinfo close button
* Group supports rule
* Update tiddler title icon
* Fix wrong float and margin
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