Buffer more bill fields

When updating a bill's repeat/target count using the `+/- 1/10` buttons
and playing with a laggy connection the UX is not great as it's possible
to click multiple times in quick succession and have the change
registered as if the button was clicked only once. This fixes that.

Author: mibac138

Source/Client/Syncing/Game/SyncFields.cs

@@ -152,7 +152,7 @@ public static void Init()
                 nameof(Bill_Production.targetCount),
                 nameof(Bill_Production.pauseWhenSatisfied),
                 nameof(Bill_Production.unpauseWhenYouHave)
-            );
+            ).SetBufferChanges();
 
             SyncBillIncludeCriteria = Sync.Fields(
                 typeof(Bill_Production),