Double-click to sign up for a group in the Premade Groups finder

[kingnothing7]

Pretty simple idea here. In the Premade Groups finder (hotkey I), I would like to be able to sign up for groups simply by double-clicking them. This would be faster than the current way it works (clicking it to highlight it, then clicking the "sign up" button at the bottom). This would very handy when trying to join groups which fill up very, very quickly.

Any help would be much appreciated.