Version 2.4.0

[hej2010]

• Reduced folder loading times
• Remember video playback position, e.g. after screen rotation
• Added a button to create a new folder in the current directory
• Long press on an empty folder to delete it
• Increased maximum iteration count to 2 million
• Menu option to scroll to the first/last file with a note
• Filter files that have / don't have a note
• Removed "Display only decryptable files" setting

Closes #156
Closes #128
Closes #122
Closes #111