OLED UI consistency

[Duckle29]

The UI can currently be a bit messy, with current state appearing on different lines, and error messages causing empty lines with little info.

This needs to be reworked so that the user doesn't have any doubts about what's going on with the controller.

Additionally, we should consider removing the current readout, at least after initial testing of the box has been completed.

[Duckle29]

Current readout removed, states on consistent lines. Errors should be shown

Suggestion was made to not show the machine name if we need a line for additional information, as the boxes are attached to the relevant machines