Can not run Configured task

[RomanNikitenko]

Description

Task configuration can not be found for running after configuring 'detected' task.

Reproduction Steps

1. Configure a 'detected' task
2. Try to run the 'configured' task

You can see error in the browser console: "task ERROR Can't get task launch configuration for label: build"

Please see https://youtu.be/8TNbMWVv2y8

Diagnostics:

As far as I can see the cause of the problem:

• source folder is used as key for saving configurations of tasks to map from a config file
• _source is used to get task configuration at running
• but source of a task (not source folder) is set as _source when configuration is read from a config file

In other words path to the source folder is used to save configuration, but type of a provider for 'detected' task is used to find this configuration for running.

[akosyakov]

cc @elaihau

[RomanNikitenko]

The behavior was changed: after configuring of detected task, this one is not present in configured tasks section, so I can not reproduce the issue.
The issue can be closed, if the new behavior is correct.

I created the issue #5747 to clarify and discuss the new behavior.
@elaihau