Not really a problem (or a bug) but a minor annoyance. Assuming 125 and 150 DPI are commonplace settings (and even defaults, depending on monitor size/resolution), I'd expect the UI (any UI) to behave the same way as 100, without hiding stuff and adding the need for extra clicks. It seems like the space is available, although I can't be 100% sure on that.
I know this is nit-picking, it's fine as it is. The main categories (Windows/Office) are promptly available anyway. Just thought I'd mention it.