Are you still there message has very odd units

[jsoref]

https://github.com/pydio/pydio-core/blob/cf13dcd5ad93bb1e8a59c020951c1a5d219c6f11/core/src/plugins/gui.ajax/res/js/ui/ReactUI/modal/ActivityWarningDialog.js#L57

https://github.com/pydio/pydio-core/blob/64bd811df8b7552a61357df657c206ce4cf5bef5/core/src/plugins/core.ajaxplorer/i18n/en.php#L433 "375t" => "Are you still there?", https://github.com/pydio/pydio-core/blob/64bd811df8b7552a61357df657c206ce4cf5bef5/core/src/plugins/core.ajaxplorer/i18n/en.php#L434

https://github.com/pydio/pydio-core/blob/b6dc3e02fd132e0cb0cbcd41f576a006cc5a9b6a/core/src/plugins/gui.ajax/res/js/core/util/ActivityMonitor.es6#L267

This is pretty bad in a number of ways:

1. __LOGOUT__:
   • "mn" is a totally bogus abbreviation for minutes.
   • This isn't localized/localizable.
2. __IDLE__:
   • There's no unit for this at all.
3. The en text is corrupt:
   • since more than is broken, it could be for more than X {delta-units} or since {absolute-time}.
   • There should be a period for both sentence-like parts of this message: We ... than __IDLE__. For ... in __LOGOUT__.