* improve: show possible reasons when url fetch fails
* Only check for fail reasons if no HTTP status code
* Check for mixed content errors first
* Harmonise error messages
* Set error source to 'fetch'
* improve: hide loading validator image (#4287)
* hide missing validator image
* Render nothing if validator badge has not loaded/received errors
* Revert style changes
* Allow images with data scheme (#4305)
* Add UnitTest for image
allows image elements with https scheme
* Test images with data scheme
* Add allowedSchemesByTag
* Fix error Strings must use doublequote quotes
* Add empty div (#4236)
if there are properties show an empty div
* v3.12.1 (#4311)
* v3.12.1
* Rebuild dist for v3.12.1
* Use window wrapper instead of direct reference
* Add trailing period to error messages
* improve readability
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