Cannot have .circular and .suggested-action at the same time
From this stackoverflow question: https://stackoverflow.com/questions/58154264/how-to-create-a-suggested-rounded-button-in-gtk-rs
I have tried to add the two style classes .circular and .suggested-action to a button using Glade. They work together only when the button is in the pressed state (:active), but not in the normal case when the button is unpressed.
Test UI xml: button_circular_and_suggested_action.ui
gtk-builder-tool preview button_circular_and_suggested_action.ui