Ctrl+K should open link URL editing dialog

[Reinmar]

1. http://localhost:8125/ckeditor5-core/tests/manual/article.html
2. Click the link. Link balloon appears.
3. Press Ctrl+K.

Expected: something could happen.

Actually: nothing happens.

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Another scenario:

1. http://localhost:8125/ckeditor5-core/tests/manual/article.html
2. Click next to the link. Press arrow keys to navigate into the link.
3. Press Ctrl+K.
4. The link balloon appears.

How to start editing the link now? You need to Tab to the "edit link" button and press Enter.

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I think that both these cases would benefit if Ctrl+K press when the link balloon is visible, would switch to the link URL editing balloon.

[Reinmar]

cc @oleq @dkonopka

[dkonopka]

Agree that first scenario should open editing balloon (if it's opened), but TBH I'm not sure to turn on this step in the second scenario (what if someone wants to open link in the new tab instead of editing it? Users needs to go "check" button, it's not so intuitive. )

On the other hand, would be great if the behavior of shortcut Ctrl+K will be always the same.

[Reinmar]

(what if someone wants to open link in the new tab instead of editing it? Users needs to go "check" button, it's not so intuitive. )

The link balloon will be visible too:

I think that both these cases would benefit if Ctrl+K press when the link balloon is visible, would switch to the link URL editing balloon.

So, there will be two steps always:

• First you need to see the link balloon (by clicking on a link or by pressing ctrl+k).
• And then you can go to the link editing ballooon (by clicking "edit" in the first balloon or by pressing ctrl+k again).