Adding "open" class to dropdown toggle if it is open
Adding "open" class to dropdown toggle if it is open

Helps differentiate between itself and nearby buttons during dropdown
open state, following bootstrap’s design patterns

nooproblem/influxdb,influxdb/influxdb,nooproblem/influxdb,mark-rushakoff/influxdb,mark-rushakoff/influxdb,influxdata/influxdb,nooproblem/influxdb,influxdb/influxdb,influxdb/influxdb,mark-rushakoff/influxdb,mark-rushakoff/influxdb,nooproblem/influxdb,influxdb/influxdb,mark-rushakoff/influxdb,mark-rushakoff/influxdb,li-ang/influxdb,li-ang/influxdb,influxdb/influxdb,nooproblem/influxdb,influxdata/influxdb,influxdb/influxdb