Use JQuery.detach on removeItem so custom data attributes are retained #1251
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I'm using a custom Item renderer with some custom data attribute fields. When .remove is used, JQuery removes the data-* and event handlers. Since selectize caches the rendered item it doesn't get created each time so the data-* attributes and even handlers are lost. To prevent his situation I changed the .remove() to .detach(). I also added a test to check for data-* attribute retention.