Show disclaimer of raw sensor data below graph

[LuchtwachtersDelft]

On the Luftdaten homepage there is an disclaimer below the map that explains the measurements are uncorrected.

As participants often like to share the graphs from Madavi on social media it would be prudent to also add a disclaimer below the graphs. In case of the PM graphs a disclaimer could additionally clarify the dependency on relative humidity.

For example, Scapeler displays "Raw and/or unverified sensor data per minute, averaged over 5 minutes".