Selected World is automatically played

In the "Select World" browser klicking a world immediately plays it and not just selects it to be renamed, deleted, etc.

How to produce:
Loading a world and klick "save and quit to title" as soon as possible (while chunks still load)
Now if you klick on a world in the "Select World" browser it immediately plays that world and doesn't select it.

This is fixable by minimizing the window.