PRO license https fix plus new control setting imageFillOnLoad

• PRO license details didn't consider https. Fixed.
• New control setting imageFillOnLoad ensures 360 images cover the entire viewer container on load. It's very useful when the images have some background and you don't want to see any gaps horizontally or vertically between the images and the 360 product viewer container. In XML: <control ... imageFillOnLoad="true" />