Grafana query search limits the shown measurements to 100

[dirkjanfaber]

Continuation of victronenergy/venus-docker-grafana#8 in the new repository on request of @mman

[mman]

To not forget where this is coming from, this is the original patch that limits the number of returned measurements in the auto complete popup to 100:

https://github.com/grafana/grafana/blob/8f38ef70ceaea12ca27bc0d856951e6e036da115/public/app/plugins/datasource/influxdb/influxql_query_builder.ts#L118-L123