The bar clock stays still for every button
A change merged into quattro keeps the bar clock's label still for every mouse button. An earlier change merged into quattro had left the press animation on left and middle clicks.
Right-clicking the clock to cycle its format had started the bar's press animation. The label shrank to 0.9 and sprang back, and the new format was what shrank as it landed. That change limited the animation to left and middle clicks. Opening the calendar and the timezone picker still ran the press animation. Cycling the format did not.
The later change treats the clock as text to read rather than an icon to press. The pull request says shrinking it looks wrong under any click, because the calendar it opens, the format it cycles to, or the timezone picker is feedback enough. The label stays still for every button, and every other bar widget keeps its press feedback.