We don't have to deal with background images attached to various parts of the
button like we did on macOS before, so we can just flip the icon and be done
with it.
- Speed up transition to 0.2s
- Focus once the transition is fully done
- The actual input field is hidden and the button is displayed 50 milliseconds
after the field starts shrinking to not have the magnifying glass
appear to the right of the input field right before the input is
hidden.
