According to docs: "targetFrameRate is ignored in the editor".

In practice:
- it works in the editor as long as vsync is off
- once set, it keeps its value until reset again

Repro:
- switch off vsync in current platform's quality settings
- set a frame rate from script:
function Awake () { Application.targetFrameRate = 20; }
- play, notice the setting takes effect (FPS==20)
- stop, comment out the script
- play, notice the setting is still on (FPS==20)

Expected:
- either expose targetFrameRate as a setting (and change docs) or disable it in the editor

Not a regression, same behaviour in 3.4.