To reproduce:
1. Open attached project;
2. Open the scene movelightmapobject;
3. Press play and try to move cube in Scene View. ( You can't because it says "static" and the arrows are grayed out.);
4. Stop play mode and go to the Cube and enable the "Move" script;
5. Press Play again.

Expected result: Light-mapped static objects can be moved in scene view while play mode is on.
Actual result: LM static object can be moved only with the script.

Reproduced in : 5.5.1f1; 5.6.0b9; 5.4.4f1