reset asset select message by id when asset unselected

Resetting using the class could cause an incorrect "you can pick an
$item from the map" message to be display when asset_groups were being
used. This was happening when the unselect event was firing after the
category change event and then updating the new message using the
message from the unselected layer.

Fixes mysociety/fixmystreet-commercial#1888

0 files changed, 0 insertions, 0 deletions