config.py -- changed 'kg5' to 'KG5'

Uppercase seems to be the official name.
uspec.py -- stopped a filter change adding an extra 'filters' element.
slide.py -- added comment about checking slide position.

Added this because the slide is unrealible in reporting its status.
drivers.py -- changed start / stop buttons. Store simbad lookups

Now have a defined background colour when disabled. Simbad successes and failure are stored.
globals.py -- added some more colours
uspec.py -- enable / disable of start buttong changed