Currency Symbol - Feature Request

[cello8619]

Hello, for all of the cost fields can we have the ability to add the currency symbol. I know it is possible in grafana but the existing dashboards will not save, I can copy the dashboards and re-do but then the links from the TeslaMate main page would not bring me to the updated dashboards. I was thinking it would be nice in the settings screen in TeslaMate to choose either no currency symbol or be able to pick from a list and then all the dashboards would reflect the correct currency.

[3isenHeiM]

Indeed, this would be nice to have them defined site-wise.

In the settings webpage, we could have another field with the currency

Then it could populate the global_settings file https://github.com/adriankumpf/teslamate/blob/master/lib/teslamate/settings/global_settings.ex