Manage errors in front application

[lunika]

Feature Request

Is your feature request related to a problem or unsupported use case? Please describe.

The front application is growing. For now there is no error management. We should at least display an error message explaining what happen and what to do.

Describe the solution you'd like

When an error happen, mostly a network one when we update or fetch data, nothing is display if the fetch fails. A message should be display.