Lazy Load [img] 2.7.2

• Update to lazysizes v5.1.2 from v4.1.4
• Add style properties for lazyload/lazyloading/lazyloaded classes

• Add "blank SVG" option to allow customizing of the blank SVG template
  • Fix potential SVG rendering issue

• Compatibility fix for older browsers where lazy loaded images just do not load
• Fix that attachments would not show as expected for some devices

• Fix javascript error in thread on-hover preview

• Fix that "Force lazy loaded spoiler" would result in spoiler'ed images failing to load for users without the lazy loading permission

• Fix for "Template error: Cannot call method getCss on a non-object (NULL)"

• Ensure lazy loading javascript is injected everywhere the lazy-loaded enabled images could be.
• Support XFRM/XFMG
• Fix spoiler'ed images not loading as expected in XF2.1

• Compatibility fix for [bimg] bb-code from Advanced Bb Codes Pack (paid) add-on
• Add an icon

• Fix issue support for XF2's lightbox, should cause images to be correctly loaded now

Known issues:

• Compatibility issue with @au lait's paid SEO (SEO2) add-on
• Compatibility issue with some mobile devices.

Changes:

• Fix compatibility issue with XF2.1 extended image tag format.