fixed a bug with OE connection changed the db name and blocked restore (#570)

Author: llali

src/Microsoft.SqlTools.ServiceLayer/ObjectExplorer/ObjectExplorerService.cs

@@ -414,6 +414,19 @@ internal ExpandResponse QueueExpandNodeRequest(ObjectExplorerSession session, st
                                }
                                response.Nodes = nodes;
                                response.ErrorMessage = node.ErrorMessage;
+                               try
+                               {
+                                   // SMO changes the database when getting sql objects. Make sure the database is changed back to the original one
+                                   if (bindingContext.ServerConnection.CurrentDatabase != bindingContext.ServerConnection.DatabaseName)
+                                   {
+                                       bindingContext.ServerConnection.SqlConnectionObject.ChangeDatabase(bindingContext.ServerConnection.DatabaseName);
+                                   }
+                               }
+                               catch(Exception ex)
+                               {
+                                   Logger.Write(LogLevel.Warning, $"Failed to change the database in OE connection. error: {ex.Message}");
+                                   // We should just try to change the connection. If it fails, there's not much we can do
+                               }
                                return response;
                            });