Custom transfer amount to hydroponic trays (#5833)

Content.Server/Chemistry/Components/SolutionManager/RefillableSolutionComponent.cs

@@ -1,6 +1,7 @@
-using Robust.Shared.GameObjects;
+using Robust.Shared.GameObjects;
 using Robust.Shared.Serialization.Manager.Attributes;
 using Robust.Shared.ViewVariables;
+using Content.Shared.FixedPoint;
 
 namespace Content.Server.Chemistry.Components.SolutionManager
 {
@@ -21,5 +22,13 @@ namespace Content.Server.Chemistry.Components.SolutionManager
         [DataField("solution")]
         public string Solution { get; set; } = "default";
 
+        /// <summary>
+        /// The maximum amount that can be transferred to the solution at once
+        /// </summary>
+        [DataField("maxRefill")]
+        [ViewVariables(VVAccess.ReadWrite)]
+        public FixedPoint2? MaxRefill { get; set; } = null;
+
+
     }
 }