fix(all): update panScale for panning sensitivity when size is changed.

[jongmoon]

Issue

#204

[coveralls]

Coverage increased (+0.6%) to 93.044% when pulling 37e853b on jongmoon:FullScreen#204 into fb8d2c9 on naver:master.

[mixed]

LGTM.

[mixed]

I think that updateViewportDimensions can make simple using destructuring assignment.
How about it?

updateViewportDimensions(size={width:undefined, height:undefined}) {
	if (!this._isReady) {
		return this;
	}

	let containerSize;
	let [width, height] = size;

	if (width !== undefined || height !== undefined) {
		containerSize = window.getComputedStyle(this._container);
		width = parseInt(containerSize.width, 10);
		height = parseInt(containerSize.height, 10);
	}

	// Skip if viewport is not changed.
	if (width === this._width && height === this._height) {
		return this;
	}

	this._width = width;
	this._height = height;

	this._aspectRatio = width / height;
	this._photoSphereRenderer.updateViewportDimensions(width, height);
	this._yawPitchControl.option("aspectRatio", this._aspectRatio);
	this._yawPitchControl.updatePanScale({height});

	this.lookAt({}, 0);
	return this;
}

[jongmoon]

@mixed Thank you for suggestion. That makes code more neat!
I'll apply it except the some logical part. Because there's some difference that I've intended.

[mixed]

nit

updatePanScale(param={}){
   const areaHeight = param.height || parseInt(getComputedStyle(this._element).height, 10);
}

[jongmoon]

@mixed I'll apply it! Thank you 👍