0.47.11 (and earlier versions) - bug on 'Map Size' function on 'Select Map' tab of Lobby

[SimonLandmine]

0.47.11 standalone (and earlier versions)
Windows 10
Java 11.0.8

Slightly odd behaviour when in the Lobby, using the Map Size function for multiple boards on the Select Map tab.

To replicate ...

1. Click Map Size button.
2. Select a map size of 3 boards by 3 boards, and click Okay,
3. The Maps Selected field will show numbers for maps 0 to 8, matching the reference grid of 9 boards on the left.
4. Click Map Size button again.
5. Select a map size of 2 boards by 2 boards, and click Okay.
6. The reference grid will now show 4 squares, but the Maps Selected field will still show numbers 0 to 8.