Atm, it's not clear if the widget is clickable or not.

nicoburns:
Some kind of button with an "active" state would be nice, so that you can more easily tell which bits are clickable.

(from https://www.reddit.com/r/rust/comments/ale980/a_wasm_version_of_my_tactical_game_zemeroth_is)

Related to #150