Added settings to improve performance on IE 11 by allowing prevention of DOM object removal #142
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I've added two extra settings aimed at improving performance. This has a substantial effect on modern heavy AngularJS apps on IE 11. In my performance tests, I was seeing 600ms overhead due to the offsetWidth calculations when the component was added/removed from the DOM.
The new settings will prevent DOM manipulation and will only hide the progress when it is done, so it is ready to go for the next call on SPAs.