Selected widget's outline should be visible when editor is in read-only.

[oleq]

📝 Provide detailed reproduction steps (if any)

1. Open an editor with a widget inside.
2. editor.isReadOnly = true
3. Select the widget using the handler

✔️ Expected result

❌ Actual result

What is the actual result of the above steps?

📃 Other details

In #1261 we got rid of it completely, which is wrong because you still can click the selection handler and copy the entire table. Users should be notified about this kind of widget selection just like they are notified about regular text selection in read-only mode.

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