RA/DEC fields were not triggering the signal calling setDirty and saving the scheduler job values.

Create a scheduler job with any target and sequence.
Double-click to edit the job.
Edit RA and/or DEC fields.
Without the fix, jobs would not re-evaluate on-the-fly to schedule the new coordinates, and values would not be saved.
With the fix, re-evaluation is triggered when the focus leaves the edit field, and RA/DEC changes are properly saved.