Feature Request: Configurable Expansion Levels in Gantt View

Issue:
Programs often include multiple projects, each with complex task hierarchies. In the Gantt view, fully collapsing provides too little information, while fully expanding creates an overloaded, slow, and unreadable chart. There’s currently no way to control how deep the task tree expands.

Request:
Add an “Expand Level” control that lets users choose how many hierarchy levels to show — for example:

• Level 0: root projects only

• Level 1: first-level parents expanded

• Level 2: second-level parents expanded
  …and so on.

The UI could use simple “indent/outdent” style buttons (similar to text editors) to adjust the visible depth interactively.

Why it matters:
This feature would let users find the right balance between overview and detail, improve performance for large programs, and make navigation much easier in multi-project Gantt visualizations.