How to reproduce:

• Open resources' explorer tool
• Add a connection to a CMIS server with an error in the given URL
  • You can't access to the resources of the server => OK
  • The icon on the tree has a red decorator to inform you that there is an error => OK
• Modify the connection to the server and fix the URL
  • You can access to the resources of the server => OK
  • The icon on the tree still has the red decorator => KO, the folder should have been refreshed and the decorator should have disappear
• Refresh the tree by clicking on the refresh button in the top right corner of the tool
  • The red decorator on the icon disappeared => OK