Reproduction steps:
1. Open the attached project "change-mode.zip";
2. Go to the build settings and build the project for MacOS;
3. Run the built project;
4. Press 'W' to switch to windowed mode;
5. Press 'M' to switch to MaximizedWindow mode;
6. Move the mouse to the top of the screen.

Expected results: Screen.SetResolution(FullScreenMode.MaximizedWindow) keeps the menu bar and dock.
Actual results: the dock does not appear after hovering in the area on top of the screen.

Reproduced on: 2018.1.0a1, 2018.1.0f2.
Not reproducible on: 2018.2.0b3.