• KOReader version: 2020.03.02
• Device: Kindle PW3

Issue

After exit, KOReader doesn't remember Frontlight value used before turning off.

Steps to reproduce

1. Kindle menu: set Frontlight (e.g. 10)
2. Open KOReader via KUAL
3. It sees the correct value of Frontlight (10), OK
4. Turn off Frontlight and try to toggle - resumes back to 10, OK
5. Turn off Frontlight via "Toggle" (in menu, or with gesture)
6. Exit KOReader
7. Return to KOReader via KUAL. Try to toggle Frontlight - it stays at 0, while gesture popup says "Frontlight off" each time.

So probably KOReader should remember the previously used value of Frontlight before exit?