fix(link): fixed link cursor focus

[ReFFaT]

I solved a problem where if we used a link to the selected text, the focus would be on the penultimate character. The problem was that the link wraps the selected text in [text] and adds one character before. It turns out that the focus that was already there remains in place, but an invisible additional character appears in the text. I solved the problem by adding an empty text selection. However, it was not possible to attach it to the existing dispatch — the link was copied to the plain text. When creating a new dispatch, the problem was solved. If you can tell me how to get around this, I would fix the re-dispatch.

[gravity-ui-bot]

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