[bug] & in filename breaks iframe for OnlyOffice.

[gmoore-sjcorg]

Description of the bug

Filenames that contain an ampersand result in a 550 error from FTP server.
Converting the & to %26 resolves the issue.

Step by step instructions to reproduce the bug

Connect FTP source, place a file that has a filename containing an &.
Navigate to the file and open in onlyoffice.

Can you replicate that error from the demo?

Internal Server

Observed behavior

{"status":"error","message":"Unexpected LIST response: []"}

Expected behavior

OnlyOffice will load showing the document.