Modern applications have abandoned (and rightfully so) the legacy title bar and now have integrated menus and buttons to maximize UI real estate for their applications.
This is 2019 not Windows 95. Please make the Lister Title Bar a customizable toolbar.
Also make an option to remove the minimize. restore, and close button (some users don't need them, after all Opus users are advanced).
Alternatively, implement a persistent full screen option (Opus opens up in full screen if previously set).
Visual Studio 2019
Opus 12.12 still has Legacy title bar in this customizable application instead of a Functional title bar.