Clickfinger button mapping cannot be changed (but tapping can)
Brought up in !898 (comment 1956174) by @marcan
We can libinput_device_config_tap_set_button_map()
so that 2fg tap is middle and 3fg tap is right, but we cannot do the same for the clickfinger method, leading to the odd case that a 2fg interaction does something different with tap vs click. Not ideal though afaik we've never had a bug filed about that.
Ideally we have a similar config call to apply the same mapping to clickfinger.