makes dragging smoother, no jitter

gloss/ContentView.swift

@@ -20,6 +20,8 @@ var currentOffset : CGFloat?
 var gTracker: VisibilityTracker<String>?
 var printCount: Int64 = 0
 
+var disableDrop = false
+
 // var curBook = "John"
 
 extension UserDefaults {
@@ -922,6 +924,10 @@ struct DropViewDelegate: DropDelegate {
                 return
             }
 
+        if disableDrop {
+            return;
+        }
+
 
             var newRibbon = draggedItem! 
             var newDest = destinationItem
@@ -942,6 +948,10 @@ struct DropViewDelegate: DropDelegate {
             newRibbon.pos = destinationItem.pos
 
             _ = try await appDatabase.updateRibbonPosition(&newRibbon, oldPos, newPos  )
+            disableDrop = true
+            DispatchQueue.main.asyncAfter(deadline: .now() + 0.5) {
+                disableDrop = false
+            }
             draggedItem!.pos = newPos
 
             // draggedItem = nil