Make the search bar visible when users press CMD+F (or windows alternative).

At the moment, when you click to search text on a document that's shared for review, it seems like the search bar doesn't appear. But in reality it's hidden behind the comments panel. You have to close the comments/preview panels to see it.

This causes a lot of "there's no search bar" comments from users, and we have to specifically tell them now when we share for review "it's hidden. Close this panel".

The search function should always be visible when someone presses CMD+F.