Couldn't select the Bone by clicking on it while using the bone editor

Steps to Repro:
1. Open attached project > assets
2. Select square sprite > sprite editor
3. Select bone editor form drop down menu
4. Select square > create few bones
5. Select any bone by clicking on it

Note:
Also under skin and weights geometry, the generated outline doesn't get selected too

Actual Result:
Observe that bones do not get selected

Occurring With:
2018.2.0a7, 2018.2.0a5

Working With:
2018.2.0a4, 2018.2.0a1, 2018.1.0b13

Environment:
Windows 10, Mac 10.12, 10.13