Sorry, this had to be done. Go Away 2 char indent from the arduino ui, i
hate you.
Handle low values a bit better
Better default names for sensors, we have two sensor islands. Name accordingly
Add defines for button numers, this at least gives us a chance for grep
for usage, even if it is a 1-1 map against numbers right now
Make button handling a bit more logical by using all 4 buttons;

Use an active_config variable instead of using a negative selection, a
single byte saved does not justify this sillyness.
Fix the rest of the negative config_selection things
Fix the timestring routinte, this was madness
Set a reasonable watering default duration
Overhaul the watering configuration option. Set a better name and update
button handling