The Bug:
You cannot double-click on server regions within the realms select region menu to select them.
Within similar menus such as the singleplayer world list, multiplayer server list, and languages list, you are able to double-click on fields within the list to interact with them, but this is not the case with fields in the "Server Region" realms menu, therefore introducing an inconsistency.
Steps to Reproduce:
Navigate to the realms menu.
Select your realm, configure it, and go to the settings tab.
Click on the “Select Region” button and attempt to double-click on a server region in order to select it.
Observed Behavior:
You cannot double-click on server regions to select them.
Expected Behavior:
You would be able to double-click on server regions to select them.