Shipment menu visibility

This issue is linked to #260 (closed) and is NOT urgent

Similarly to the Manager Menu, the Shipment menu might be visible or hidden depending on:

Sample Tracking is developed as a module that can be active or disabled. It means that both in the back-end and the front-end we need a config file that enables/disables ST. A config parameter can be added here to disable fron the front-end: https://gitlab.esrf.fr/icat/E-DataPortal/-/blob/master/src/config/ui/config.js#L8
Only participants with a valid proposals can ship parcels. It means that the menu will be hidden if (My Data).investigations.length == 0