Cleaned up the code
Replace some old functions with new ones
Adapted to the new library environment
Enable/Disable display user/downloaded image
Autodownloader option 'Show notification' not saved
Separate thread for standalone video downloader
Expanded the description of some errors with additional information
Fixed date/time renaming issue
Fixed internal library bugs
Fixed minor bugs
Brushed the code in some classes
Extended PropertyOption attribute
Removed AuthNullException
Moved ExitException to UserData class
Removed Instagram HashUpdateRequired and its environment
Changed Reddit response status code check
Twitter images bug
Added Scheduler, task startup delay, webp to jpg
Fixed Stop button bug
Minor changes
