Update 0.20.2

Added:

• Added result screen when clicking on a time-limited challenge that has already ended
• Result screens for time-limited challenges that have ended can be accessed for one week after the end date
• Added missing translations

Fixed:

• Fixed mouse input being registered while the application was in the background
• Fixed audio still being played while the application was in the background
• Fixed buttons not having the correct text color sometimes
• Fixed an error that showed up when exiting or restarting a personalized training too quickly
• Fixed challenge codes not working when they start or end with white-space characters