Sortable: Fixed jerkiness with nested-sortables. Fixes #4857 - Nested lists don't work properly with sortable.
Sortable: Fixed container change detection. Fixes #5159 - Remove and receive events on nested sortables.
Core: Deprecate .enableSelection() and .disableSelection(). Fixes #7755 - Core: Deprecate .disableSelection() and .enableSelection().
Core: Whitespace.
Build: Update link to AUTHORS.txt during release.
Datepicker: Updated zh-CN, zh-HK, and zh-TW locales. Fixes #8511 - Localization Issue: the monthNameShort in Chinese is wrong.
Datepicker: Replace HTML entities with characters in es, fi, gl, is, it, pt-BR, pt and sl i18n files. Fixes #8515 - Datepicker: Translation displays HTML entities when setting some formats
Updated AUTHORS.txt.
Autocomplete: Fixed an invisible character tht lead to a failure of the function.
Revert "Datepicker: Modified _updateDatepicker to not update display if updated instance is not current instance." This revert fixes a more serious problem: Fixes #8522 - Calendar doesn't render when moving between datepicker controls.

This reverts commit b4ef2f7ebb1162f75d8fa3276d73e4746bcace84.
Tooltip demo: Remove leftover styles from popup widget.
Position cycler demo: Cleanup.
Tests: Removed completed TODO.
Accordion tests: Added test for widget() method.
Autocomplete tests: Added test for widget() method.
Menu tests: re-order tests.
Menu tests: Added test for widget() method.
Progressbar tests: Added test for widget() method.
Spinner tests: Added test for widget() method.
Whitespace