User defined units and decimals

I think that user defined units or at least unit abbreviations (e.g.: “kWh” instead of “kilowatthours”) are really needed on tiles.

More decimals (3 are enough) is also needed, because there are a lot of tiles with numbers what are useless without them (e.g.: the unit of water consumption is m3 - but the normal daily consumption is 10-200 liters and that’s really invisible without decimals).