TypeScript builder locks workspace and prevents other operations (save) from completing

[mickaelistria]

The TypeScript builder seems to be locking workspace (probably using a WorkspaceJob) for a while, although it may not be necessary to lock it fully: only write operations need a lock, and it's usually included in the write actions directly without need to take care of locking.
As a consequence, other workspace write operations (save, builder...) are queued and the workspace becomes unusable until the TypeScript Builder completes.

Please avoid such situation of locking workspace for long and preventing user to keep on working, those are very badly perceived by users.