On my widescreen, the buttons are completely gone when I shrink vertically to about 720 pixels. So they must be gone on a 600x800 screen or 720x1280 small widescreen and perhaps on a non-fullscreen window on a 780x10xx screen. I agree with fixing this if possible.

The patch applies cleanly to 3.4 and fixes the problem with the buttons. However, it introduces a problem with the vertical canvas scrollbar, on the right. It does not appear when it should and does not scroll the entire canvas when it does appear. Try it with bytedesign, and see if you can fix it with an altered patch.