fix command execution for inline editors

[akosyakov]

What it does

• fix enter is not working in debug console #6325: fix command execution for inline editors

Since migrating to Monaco 0.18 we handle monaco keybindings to avoid some bugs, like inability to close the reference widget. It led to a regression for inline editors, since they are not tracked by editor managers.

This PR tracks the last focused Monaco editor regardless whether it is inline or not and apply Monaco commands to it.

How to test

• Use inline editors, like input in the debug console and breakpoint expression editor, and make sure that keys applied to them when they are focused.
• Check that there is no regressions for editors widgets by typing and using features as content assist and find references.

Review checklist

• as an author, I have thoroughly tested my changes and carefully followed the review guidelines

Reminder for reviewers

• as a reviewer, I agree to behave in accordance with the review guidelines

[svenefftinge]

works well