Player update information

The player has been updated with the following changes:

1. Custom Addons Editor now allows defining the default values for properties. Simply add another (fourth) value in the definition of the property, e.g. "Loop, boolean, ,True". The Addon Model documentation page has been updated.
2. We’ve added an option of embedding javascript libraries in Custom Addons dynamically. This allows for a huge expansion of the possibilities. You can now simply create a new property in the model section of the Addon Editor with a following syntax: "{library}, script, ,URL", where the last value should be an asset, e.g. "{library}, script, Lottie, /file/serve/6421765106827264".
3. There is a new property in the Ordering module - “disable axis lock”. When enabled, it allows the items to be dragged also vertically, so a style to the module can be added, that allows for a line-break, which can be useful e.g. in a mobile layout.
4. We’ve fixed a bug in the Media Recorder module, where recording on Safari browser on a device with M1 processor didn’t work.
5. A fix has been made that prevents XSS for MathText addon.
6. On pages with one Source List module and two Table modules with draggable gaps sometimes an error occurred that caused an item from the Source List to be unintentionally put into the wrong table.