FPS Unlocker UsePowerSave sometimes doesn't recognize focus change

[Epikest]

Describe the bug

the option UsePowerSave in FPS Unlocker sometimes fails to uncap the fps after returning focus to the Genshin Impact window.

To Reproduce

Steps to reproduce the behavior:

1. set "UsePowerSave": true in unlocker.config.json
2. start the game with the FPS Unlocker
3. try ALT+TABing a couple times
4. when the game window is focused the FPS could be locked to save power

Alternative method:

1. click "Start game" in Stella Mod Launcher
2. when the terminal window opens, click onto any maximized window to make it lose focus
3. game will open and should be unfocused in the background
4. upon ALT+TAB into the Genshin Impact window, the FPS will still be capped at the "START GAME"/"Login" page

Expected behavior

power draw reduced when window not focused, power draw increased when window focused.

Screenshots

Desktop

• OS: Windows 10 22H2
• Build: 19045.2846
• Stella version: v8.0.1.0

Additional context

most commonly occurs right after the Stella Mod terminal window closes and the Genshin Impact process starts.

[sefinek24]

I will look into it soon