Pydio Cells & Enterprise 4.3.4

Version 4.3.4 is another small bugfix release:

• An unreleased handle could prevent liberating disk space when purging activities and compacting DB.
• Better handling of "zero" value edge-case in UX for metadata Integer type.
• Possible nil ref in handler-path-multiple-root could put Websocket service down.
• Updated misc context metadata for specific logging and errors.