As a user I can toggle on or off low grade sensor data so that I can see the effect they have on overall In Situ measurements

[rstrange-scottlogic]

We currently receive at least a sensor-type value for in-situ data, with values like 'reference grade' or 'low grade'

We would like the ability to filter out or in sensor data by this value.

Would need to:

• Work out what values we receive from OpenAQ. Is Sensor type the best or do they give us more info?
• Work out the range, which values should we expect for the field we use
• Make sure we're storing it
• Update the API to recieve the data with the measurement station info
• Update the UI to toggle the value and respond appropriately.