refactor: fix pickProject (we have to use namespaceWithPath as label)

When we used project.name as the quick pick item label, VS Code tried to find the query string in the item label but the query string is often not present in the project name, especially when searching by the group. This meant that VS Code filtered out most of the items.

This issue is not in a released version of the extension (it has been introduced after the last release).

before	after
pick-project-before	pick-project-after

Related to #298 (closed)