Most core applications have quite an extensive menu, easily creating a scrollbar for the menu, specially on smaller screens. When scrolling down, you lose sight of the Search field and Open documents which is quite annoying.
Therefor I suggest to make it possible for a user to pin down the Search field, the Open documents and the Favorites (each with their own setting) so that they stay locked on the screen and don’t disappear when you scroll down in the menu. This settings should be saved as a user preference.
I’d say the search field could be pinned down by default.
