Royal Road - Read Stories

- New: Subscribe/Unsubscribe to comment reply alerts.
- Fix: External login unlink caused app crash.
- Fix: Border wardrobe's image preview breaks when border is changed and user has not set any avatar.
- Fix: Selecting content on chapter page till the end of the screen caused entire page to be selected.
- TTS: Speak "exp" as "experience" and "lvl" as "level".
- Fix: Don't show a battery optimization message more than once in one app session.