Problems with Configure Tasks... quick input

[colin-grant-work]

Bug Description:

The merge of #9154 undid some of the changes to the Quick Selection code in tasks that came with #8917 in the quick-open-task.ts file, leading to some bugs.

• Workspace-scoped tasks are not displayed
• The labels for tasks in different scopes are inconsistent

Steps to Reproduce:

1. Create a multi-root workspace
2. Add some tasks to a tasks.json in each root and in the workspace file.
3. Use Terminal > Configure Tasks...
4. Observe that workspace scope is not displayed, and only one label for folder scope is displayed

Additional Information

The label for the folder leerer-ordner is displayed next to user-scoped tasks. No label is displayed for empty-folder, and the task from the workspace configuration file (center) is absent.

• Operating System: RHEL7 Electron
• Theia Version: c12d1ef