Slider frames width bug in IE and Edge

[Steam-Rabbit]

A slider has a frame width calculation bug in IE and Edge due to percent rounding.
The bug is very noticable when frames have an image background.

My quick patch:

Object.defineProperty(Siema.prototype, 'buildSliderFrameItem', {
    value: function(elm) {
        const elementContainer = document.createElement('div');

        elementContainer.style.cssFloat = this.config.rtl ? 'right' : 'left';
        elementContainer.style.float    = this.config.rtl ? 'right' : 'left';
        elementContainer.style.width    = `${this.selectorWidth / this.perPage}px`; // fix

        elementContainer.appendChild(elm);

        return elementContainer;
    }
});

https://codepen.io/steam-rabbit/pen/pYzzRw