Merge branch '2.2' into 3.0

# Conflicts:
#	gns3server/compute/base_node.py
#	gns3server/version.py
#	gns3server/web/web_server.py

gns3server/controller/__init__.py

@@ -169,6 +169,14 @@ class Controller:
 
         log.info("Controller is reloading")
         self._load_controller_settings()
+
+        # remove all projects deleted from disk.
+        for project in self._projects.copy().values():
+            if not os.path.exists(project.path):
+                log.info(f"Project '{project.name}' doesn't exist on the disk anymore, closing...")
+                await project.close()
+                self.remove_project(project)
+
         await self.load_projects()
 
     def check_can_write_config(self):