As part of the align tab, the user enters an accuracy (in arc-seconds) for the error tolerance
in pointing the telescope to the target, but the error value calculated is not currently reported
in the UI. What is currently reported is the DEC d-m-s arc-second difference, and the RA h-m-s
difference (which is not arc-seconds), not the combined arc-second difference.
I propose changing that to directly reporting the error.
With this, the difference in arc-seconds (directly comparable to the user's specification),
followed by the RA and DEC arc-second differences are printed in the UI. It is printed in green
if the specification is met, and red if it is not met, and yellow if it is not met but close.