Selling in Map Editor Displays Gold Return

• OS & Version: Windows 10 Home
• 64bit
  • RAM: 8 GB
  • CPU: Intel(R) Core(TM) i5-6500 CPU @ 3.20GHz, 3201 Mhz, 4 Core(s), 4 Logical Processor(s)
  • GPU: NVIDIA GeForce GTX 1060 3GB
• Build: v1.6f12

When in the map editor, using the sell option- such as on a room tile- makes a +250 gold (as an example) floating text appear above your hand, as though you actually sold the room. This does not actually affect the gold on the map, as far as I can tell.