gets picture URL and modifies it
gets picture URL and modifies it

picture URL is displayed as:
https://static.greenwire.greenpeace.org/sites/default/files/styles/avatar/public/uk/event/1992784d-db3b-485c-9b13-e44db9cc3011.jpg?itok=Wx9tz7MY
so a simple replace() gets a larger image to be displayed in the tooltip by replacing 'avatar' with 'extra-large':
https://static.greenwire.greenpeace.org/sites/default/files/styles/extra_large/public/uk/event/1992784d-db3b-485c-9b13-e44db9cc3011.jpg?itok=Wx9tz7MY
greenpeace/ggw_widgets,greenpeace/ggw_widgets