Microsoft Office Black Theme per leeanddrew

This theme features colors based on the "Black" theme of the Microsoft Office suite of applications (also resembling OneNote's dark theme), including:
- The black background color
- The same shade of dark gray used in the toolbar
- a URL/search bar resembling Office's search (Tell Me) bar
- dark gray dropdown menus, similar to Office's gray dropdown menus
- a white bar displaying the selected tab, representing the white bar displaying the selected toolbar tab in Office applications