Support multiple different application icons in parallel.

[vsiegel]

Large language models have so many use cases, that it would not be surprising, when a user routinely uses Thoughttree for multiple independent tasks, and uses multiple windows per task.
So he has a number of windows that look the same, but would look like distinct groups of windows when she would use more traditional software.
To support that, it may make sense to have differing icons for the windows of the application, similar, and typically one icon representing a related group.

Unclear whether that is practicable and useful.