Disconnection of socket_viewer when loading large map

[ymd-stella]

Describe the bug

When loading a large size map, stella_vslam disconnects from socket_viewer.
This problem was avoided by setting a limit on the data size to be sent, but it did not work properly in SLAM mode.

To Reproduce

Load a large map in Localization mode.

Expected behavior

• Map is displayed in socket_viewer in Localization mode when a large map is loaded
• Map is rendered successfully even in SLAM mode

Environment

• SocketViewer is running on Windows10
• Install procedure: docker