System Information
Operating system: Windows-10-10.0.18362 64 Bits
Graphics card: GeForce GTX 960M/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 382.05

Blender Version
Broken: version: 2.81 (sub 16), branch: master, commit date: 2019-11-20 14:27, hash: rB26bd5ebd42e3
Worked: (optional)

Short description of error
With a joint selected as an active object in the view port the "show active" command in the outliner shows only the armature instead of the actual selected bone.

Exact steps for others to reproduce the error

• open new scene
• create a joint chain
• close the joint chain in the outliner
• select the last bone as active object
• hover with mouse over outliner and press "numpad ," / rightclick and select View > "Show active"

Result: The outliner shows "Armature" instead of the active bone

Additional Feature Request
Please make it possible to "show active", when multiple bones are selected. (for instance the last joins of a hand)