Generate UVs in static mesh editor is unrecognized tab (usefull feature by the Polygon Editing plugin). Output:
LogTabManager: Warning: Cannot spawn tab because no spawner is registered for ‘UVGenerationTool’
LogSlate: The tab “UVGenerationTool” attempted to spawn but failed for some reason. An “unrecognized tab” will be returned instead.
LogSlate: Window ‘UVGenerationTool’ being destroyed