Remove the "inconsistent" state when the user toggles a collection
According to the docs for GtkToggleButton:
"Normally you would turn off the inconsistent state again if the user toggles the toggle button. This has to be done manually, gtk_toggle_button_set_inconsistent() only affects visual appearance, it doesn’t affect the semantics of the button."
One extra call and we unset the inconsistent state fixes #3 (closed)
Edited by IBBoard