One benefit from wasp-os' dirt simple drawing model is that it is very
easy for apps to provide full screen previews of themselves. Add this
for all clocks ready for us to add a watch face chooser application.

Signed-off-by: Daniel Thompson <daniel@redfelineninja.org.uk>

By default bright and mid are white/grey tones, the ui widgets are
blue and the spot colours are different variants of orange.

Signed-off-by: Daniel Thompson <daniel@redfelineninja.org.uk>

Make the ticks and hands larger and shorten the hands slightly to avoid
visual glitches during "undraw".

Signed-off-by: Daniel Thompson <daniel@redfelineninja.org.uk>

Signed-off-by: Daniel Thompson <daniel@redfelineninja.org.uk>