GTK3 GtkColorChooser don't show the pipette button on Linux Mint.
Steps to reproduce
run gtk3-demo
on Color Choser
example, run the example click on change the above color
-> +
Current behavior
Actually there is no a pipette button like in other OSs.
Expected outcome
In other platform the pipette button is present in the top left corner.
Version information
GTK version: 3.24.20-0ubuntu1.1
OS: Linux Mint 20.2 Cinnamon
Cinnamon: 5.0.7