Status marker for vs code tasks is not displayed

[RomanNikitenko]

Describe the bug

Status marker for vs code/theia tasks is not displayed due to upstream changes.

Che version

• latest
• nightly
• other: please specify

Steps to reproduce

1. Run a vs code task (npm or typescript, for example)
2. Wait till a task is completed or terminate this one.
3. Pay attention on a terminal tab for the task: it doesn't contain the corresponding status marker.

Please see a short video and pay attention on the difference between che and vs code tasks behavior.

Expected behavior

Terminal tab contains the corresponding status marker when a vs code task is completed.

Runtime

• kubernetes (include output of kubectl version)
• Openshift (include output of oc version)
• minikube (include output of minikube version and kubectl version)
• minishift (include output of minishift version and oc version)
• docker-desktop + K8S (include output of docker version and kubectl version)
• other: (please specify)

Screenshots

Installation method

• chectl
• che-operator
• minishift-addon
• I don't know

Environment

• my computer
  • Windows
  • Linux
  • macOS
• Cloud
  • Amazon
  • Azure
  • GCE
  • other (please specify)
• other: please specify

[RomanNikitenko]

The cause of the problem is the corresponding terminal widget can not be found due to upstream changes.
Please take into account that now theia reuses terminal widgets, so without fixing #15742 user will face with the behavior like:

• running a vs code task
• the corresponding marker is set to terminal widget when the task is completed
• run another vs code task ---> theia reuses terminal widget for completed task ---> task is running, but the terminal widget has a status marker from a previous task.

Fixing #15742 will help at this step set in progress status and avoid confusing behavior.

So, I believe this issue depends on #15742