test(cider): a half alpha bezel settles who draws last, and the OK label is under ours master
The previous commit left two explanations standing for the missing OK label and said exactly what would separate them. It took one run. CIDER_BEZEL_ALPHA draws the push button bezel at half alpha, and with it the word OK appears, WHITE, centred, correctly sized, plainly underneath. So the label is not missing, not the wrong size, not in the wrong place, and this corrects what the last message said was unsettled. LibreOffice draws it and something then makes our bezel land ON TOP of it. The button is redrawn three times per alert and the halo control showed the last of those clipped to a four row band, so the likeliest shape is a partial repaint that renders the native bezel again without the text. That is application side repaint sequencing and it wants logging there, not more guessing from here. The other half still holds and both have to be right: the label is WHITE because an application draws it that way when it believes the button is the DEFAULT one, since Apple systems fill that button with the accent colour. Our bezel is white, so even with the ordering fixed it would be white on white. The instrument stays and it is a general one: something opaque that covers another thing cannot be told from a thing that was never drawn, and half alpha separates them in a single run. docs/wayland-ok-label-under-the-bezel.png.