WPF alarm manager control makes it possible to create duplicate tags

[ritchiecarroll]

https://discussions.gridprotectionalliance.org/t/openhistorian-alerts-and-grafana-two-different-alerts-on-the-same-signal-issue/844/4?u=ritchiecarroll

End user suggestion:
https://discussions.gridprotectionalliance.org/t/openhistorian-alerts-and-grafana-two-different-alerts-on-the-same-signal-issue/844/7?u=ritchiecarroll