Correctly render continue routing
Correctly render continue routing

Nodes with `continue: true` were being ignored,
and only the first match in the routing tree was
being highlighted.

Additionally, each node was incorrectly being set
to continue=true if nothing is received from the
API. The API sends nothing if continue=false.

joehandzik/alertmanager,Aloomaio/alertmanager,GoogleCloudPlatform/alertmanager,Aloomaio/alertmanager,prometheus/alertmanager,tinytub/alertmanager,brunoqc/alertmanager,brunoqc/alertmanager,tyrken/alertmanager,brunoqc/alertmanager,prometheus/alertmanager,tyrken/alertmanager,prometheus/alertmanager,tinytub/alertmanager,Kellel/alertmanager,GoogleCloudPlatform/alertmanager,prometheus/alertmanager,brunoqc/alertmanager,tyrken/alertmanager,joehandzik/alertmanager,GoogleCloudPlatform/alertmanager,tinytub/alertmanager,tyrken/alertmanager,joehandzik/alertmanager,Kellel/alertmanager,Kellel/alertmanager,Aloomaio/alertmanager,GoogleCloudPlatform/alertmanager