Difficulty of Minesweeper can only be changed in standalone mode

[MollyMoriJing]

Describe the bug
Unable to change the game difficulty of Minesweeper in the inital size of window.

[Prozilla]

When reproducing this bug, I noticed the dropdown would briefly open and then disappear (less than a second). This is probably caused by some sort of duplicated click event in the WebView component.