Pull Request for Issue ##40678 .

Summary of Changes

When sending html mails created with com_mails it is possible to include images.

The function convertRelativeToAbsoluteUrls ensures that the images have absolute references so that they will be loaded in the email. However if the image has been added to the email using the media manager it will include loading="lazy" and data-path=

This pr strips any references to loading and data-path

https://www.caniemail.com/search/?s=loading

Testing Instructions

Set the mail templates to use html
Add an image to one of the mail templates - i suggest the Global Configuration: Test Mail
Trigger the mail and check it

Actual result BEFORE applying this Pull Request

The code for the image in the email will be
<img src="https://j5.test/images/9.webp" width="1141" height="720" loading="lazy" data-path="local-images:/9.webp">

Expected result AFTER applying this Pull Request

The code for the image in the email will be
<img src="https://j5.test/images/9.webp" width="1141" height="720">

The originakl issue report was classified as a bug therefore it should be 5.0 but it seems more like a feature so I made it against 5.1 but happy to change that.

Link to documentations

Please select:

• Documentation link for docs.joomla.org:

• No documentation changes for docs.joomla.org needed

• Pull Request link for manual.joomla.org:

• No documentation changes for manual.joomla.org needed