The ‘Close’ and ‘Windows resize’ buttons in Winbox are all the way on the right side of the interface but the most of the other GUI parts are all the way on the left of the interface, on a bigger screen, like my screen at 1920x1080, it is quite the mouse travel continuously going from the far left to the far right.
It would be a small thing, probably the least important of any requests and things on the to-do list, but I think it would be a nifty little feature to be able to relocate the window manipulation buttons to the left on the bar, instead of the right.