- enable sftp by default.
- add more descriptive stdio errors.
- disable devoptab timeout by default.
- handle errors for devoptab seek.
- add r/d/w progress events for threaded_file_transfer
- remove system album from file browser, only show sd card.
- do not clear game selection in games menu. useful for selecting games to backup, then delete after.
- change smb2 r/w to only send max amount, matches nfs behaviour. not sure if its needed as smb probably handles it for us.
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