The main function of guard components are to provide restrictions in routing level of the WebUI.

Functionality description for the following:

Component File	Description
authorisation.guard	Checks if the user has successfully logged-in and is accessing a path inside the WebUI application.
cristalDetails.guard	Checks if the user can turn-on cristal details.
form-deactivate.guard	When components ItemListComponent, ItemDetailsComponent or ItemTreeComponent is deactivated then this component displays a confirmation message to discard changes in the form or not.