Save session tree color when creating a copy of a session. See https:…

…//www.heidisql.com/forum.php?t=23796

source/dbconnection.pas

@@ -1177,6 +1177,7 @@ procedure TConnectionParameters.SaveToRegistry;
     AppSettings.WriteString(asDatabases, FAllDatabases);
     AppSettings.WriteString(asComment, FComment);
     AppSettings.WriteString(asStartupScriptFilename, FStartupScriptFilename);
+    AppSettings.WriteInt(asTreeBackground, FSessionColor);
     AppSettings.WriteString(asSSHtunnelHost, FSSHHost);
     AppSettings.WriteInt(asSSHtunnelHostPort, FSSHPort);
     AppSettings.WriteString(asSSHtunnelUser, FSSHUser);