Defines whether CSS to highlight the list being a valid or invalid drop target should be shown. This is necessary to prevent a Chrome bug that may cancel drag and drop prematurely if the DOM is changed during the 'begin drag' event of HTML5.
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Defines whether CSS to highlight the list being a valid or invalid drop target should be shown. This is necessary to prevent a Chrome bug that may cancel drag and drop prematurely if the DOM is changed during the 'begin drag' event of HTML5.