* render sensor measurements at frontend

* modify some details,create some new function:hideUnusedObjects

* delete extra comments

* modify some details:printing a warning

* modify some details

* modify some details

* commit build_fe file

* render sensor measurements at frontend

* modify some details,create some new function:hideUnusedObjects

* delete extra comments

* modify some details:printing a warning

* modify some details

* modify some details

* commit build_fe file

Bumps [websocket-extensions](https://github.com/faye/websocket-extensions-node) from 0.1.3 to 0.1.4.
- [Release notes](https://github.com/faye/websocket-extensions-node/releases)
- [Changelog](https://github.com/faye/websocket-extensions-node/blob/master/CHANGELOG.md)
- [Commits](https://github.com/faye/websocket-extensions-node/compare/0.1.3...0.1.4)
Signed-off-by: Ndependabot[bot] <support@github.com>

* fix synchronized point cloud rendering in dreamview
1. synchronize timestamp when simulation world pushes to frontend
2. eliminate front end point cloud timer trigger
3. more smoother visualization

* address code review comments
1. restore old point cloud send logic
2. style fix