Epic "Tree" tab does not render a tree for epics without sub-epics
Problem to solve
The "Tree" tab in the Epic page renders a tree when the epic contains sub-epics:
When the epic does not contain a sub-epic, no "Tree" is rendered:
This is confusing from a UX experience because the tab name does no longer represent the content accurately.
- We could rename Tree to Issues when the epic has no sub-epics
- We could create a separate Issues tab that always contains the replicated issues
- The Tree tab could always contain the entire tree for this epic until the last common ancestor and only expand the branch that contains the epic