Re: [PATCH proxmox{,-backup} 00/20] fix #7251: implement server side encryption support for push sync jobs

[David Riley <d.riley@proxmox.com>]

Thanks for your work on this.
I tested your patches for the proxmox and proxmox-backup
repositories and encountered three issues:

1. Push/Pull Job: Form validation error
When the encryption key selection is left untouched or disabled,
the form fails validation.

Reproduction Steps:
   Use two PBS instances (PBS1 with patches, PBS2 without).
   Create a datastore and an encryption key on PBS1.
   Create a datastore on PBS2.
   On PBS1, configure a Push Job for the datastore.
   Leave the Encryption Key field disabled/untouched and submit the
   form.

The following error appears:
parameter verification errors (400)
encryption-key: value must be at least 3 characters long

2. Deleting Encryption Key: "Unknown error" pop-up

Deleting an encryption key appears to succeed (the key is removed),
but the UI shows an error pop up.

Error message: "Unknown error"
Observations: No errors are logged in the browser console or the
   network tab.

3. Drag and Drop of Encryption Key File
Dragging a file from the file explorer into the "Upload from File"
form field results in a parsing error.

Reproduction Steps:
   Create Encryption Key and download it.
   Add new key
   Drag and drop the just downloaded key file into the form field.

The field displays "[object ProgressEvent]" instead of the file
content/name. Hovering over it shows:
"Failed to parse key - SyntaxError: JSON parse unexpected character
at line 1 column 2 of the JSON data"

Aside from these three points, the rest of the functionality works as
expected.