* Removed `cursor: not-allowed` style
* Sets the `umb-rte-block` `user-select` to `all`
* Adds an "invisible" selection background to `umb-ref-rte-block`
* Sets the `umb-ufm-render` text-content to be visible
* Adds `aria-hidden` attribute
* Bumped version of test helper
* Fixed the failing tests due to UI changes
* Adds `pointer-events: none` to selection-background
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Co-authored-by: Nhu Dinh <hnd@umbraco.dk>
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