Mkdocs-glightbox

* Fixed some options not working bug

* Fixed mkdocs-material header + sidebar vanishing issue when opening lightbox (Inspired from https://github.com/biati-digital/glightbox/issues/22)
* Fixed mkdocs-material content shrinking causing footer offset issue when open lightbox
* Supported compatible with mkdocs-material Instant loading feature

* Fixed assets location bug

* First release