Precision Farming Liquid Lime Fix

Fixes liming with Precision Farming.

- Liquid lime is recognized as lime by Precision Farming. The usage depends on the weights the map defines for lime and liquid lime, compared to solid lime you save 20 percent with liquid lime
- The HUD shows the matching application rate for liquid lime if the map defines a realistic weight for liquid lime
- Sections without a valid measuring point get the soil type and target value of their own position instead of the average of the working width

This mod does not add liquid lime to the game. The map must already include it with sensible values.