core: frontend: Notification for uncalibrated sensors

[dgudiel]

Current behaviour

When setting up a new BlueROV2 with QGC, QGC will tell you that calibration is required and guide you to the relevant calibration screens.

Expected or desired behaviour

It would be nice if BlueOS would give some indication/notification/warning that sensors require calibration.

Prerequisites

• I have checked to make sure that a similar request has not already been filed or fixed.

[patrickelectric]

We have a notification on the top bar when the vehicle is armed, we should have something like it when the vehicle is not calibrated.