register Monaco keybindings in reverse order

[akosyakov]

What it does

fix #6168: register Monaco keybindings in reverse order in order to match to Monaco keybindings dispatch logic

How to test

• try to navigate between suggest candidates with a keyboard, i.e. with up and down keys
• also check what there is not regression with escaping from the reference peek widget after following a referenc

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

[akosyakov]

@502647092 could you check whether it resolves the issue please?

[AlexTugarev]

keeb navigation works nicely for the suggest widget and reference widget. esc closes them properly.
nice!

[502647092]

@502647092 could you check whether it resolves the issue please?

It's work correct