Thanks for your feedback!
1 & 2: Yes, my plugin cannot control windows from other plugins, but it might change in the future. It doesn't have a high priority for me because I don't like this hotkey window anyway. 3rd party plugins may not be able to add their hotkeys to it, and I don't think it's really helpful for the player.
3: I can add text-align for the next update, that's not too difficult. Allowing more windows however is. From a design perspective, this window is not limited to gold, map, & playtime but it is generic and can be used for anything as it also allows showing Game Variables. But I can understand that the horizontal layout makes it difficult to read.