Function activateById

activateById(projectId): JProject
JMap.Project.activateById

Activate a project on the map, for a given project id.

User session rigths are checked server side and an error is thrown if user doesn't have the access right for the project.
Parameters
- projectId: JId
  The JMap project id
Returns JProject
a promise that is resolved when the project has been loaded successfully
Throws
Error missing project id or if project is not found

Example
```
try {
  // activate project id=2
  const project = JMap.Project.activateById(2)
  console.info(`Project id=${project.id} has been activated.`, project)
} catch (error) {
  console.error(`Cannot activate the project : ${error}`)
}
```