Can't add 'open in new tab' directly and need to click edit first

[jeroenrotty]

Describe the bug
There is bug when you want to add 'open in new tab' directly from the dropdown, you can't enable the option. You first have to click edit and then you open up the extra dropdown function and it works.
EDIT: Additionally, I'm having a hard time to actually save the option when enabled. You can't click away cause that would not make it save...

To reproduce
Steps to reproduce the behavior:

1. Create a link in a post.
2. Save the post
3. Try to change the 'open in new tab' function directly with the dropdown function.
4. You can see it won't work.

Expected behavior
You can add the 'open in new tab' directly without interfering with the URL behind it.

Desktop (please complete the following information):

• OS: [e.g. iOS] Mac OS X latest stable
• Browser [e.g. chrome, safari] Chrome

Additional context

• Experienced this while editing a page on a Rosetta site.

[aduth]

It's quite likely this and #15522 are of the same underlying cause.

As a result of initial debugging and checking out commits before/after the change, I believe this may have been a regression introduced in #14411 (5d6527d, cc @ellatrix).

Specifically, I observe that the activeFormats internal to RichText component are not updated when the button is pressed, but the change is otherwise applied (source). Thus, when the link format is rendered, its activeAttributes do not reflect the change.