Water flow logic tweaking:

- Less fluctuation, water doesn't constantly flow back and forth through gaps.
- Flowing water pushes characters around much more heavily, and the force is applied to the collider in addition to the limbs.
- Vertical gaps don't push characters up/down unless the character is roughly above/below the gap.

+ Renamed some fields in the hull and gap classes (Volume -> WaterVolume, FullVolume -> Volume, public fields start with a capital letter)

Barotrauma/BarotraumaClient/Source/Items/Components/Machines/MiniMap.cs

@@ -79,7 +79,7 @@ namespace Barotrauma.Items.Components
                 {
                     waterAmount = hullData != null && hullData.Water != null ?
                         (float)hullData.Water :
-                        Math.Min(hull.Volume / hull.FullVolume, 1.0f);
+                        Math.Min(hull.WaterVolume / hull.Volume, 1.0f);
 
                     if (hullRect.Height * waterAmount > 3.0f)
                     {