It is an very annoying issue (UX) that the graphics emulating settings are not being saved per project. It resets back to default everytime we
(i) reopen the project or
(ii) make a build

Especially when we work on mobile projects, emulation mode is being reset back to GLES3 for Android and emulating Metal on Metal editor, which make shaders go pink.

Steps:
1. Open new project / use the repro project
2. Note that emulation mode is "No emulation" by default for PC platform. (Edit > Graphics Emulation > No Emulation)
3. Change to "Shader Model 2" (Edit > Graphics Emulation > Shader Model 2)
4. Save the project and close Unity
5. Reopen the project, the emulation is being reset back to default (No emulation)

Reproducible: 2018.3.0a1, 2017.4.2f1, 5.6.5p1