Collections: Manage storage issue / Reaching the threshold

A warning message has to be displayed when there is a synchronisation interruption. This can happen in different use cases:

• While synchronizing:
  • Exceeding of the remaining storage of the phone
  • Exceeding of the predefined threshold. By default the threshold will be 2Go and the user will be able to configure it.

• While updating documents, ie even if the user doesn't do anything, if a document has been updated serverside and is bigger such that it makes the threshold be reached client side.

When a sync interruption happens, put the unsynchronised documents of the collection in grey style to be able to differenciate them.