fix carousel view scrolling animation

Session/Shared/SessionCarouselView+SwiftUI.swift

@@ -135,15 +135,18 @@ struct PageView<Content>: View where Content: View {
                             let predictedEndOffset = -CGFloat(self.index) * geometry.size.width + value.predictedEndTranslation.width
                             let predictedIndex = Int(round(predictedEndOffset / -geometry.size.width))
                             self.index = self.clampedIndex(from: predictedIndex)
-                            withAnimation(.easeOut) {
+                            withAnimation(.easeOut(duration: 0.2)) {
                                 self.dragging = false
                             }
+                            // FIXME: This is a workaround for withAnimation() not having completion callback
+                            DispatchQueue.main.asyncAfter(deadline: .now() + 0.2) {
                                 switch self.index {
                                     case 0: self.index = self.maxIndex - 1
                                     case self.maxIndex: self.index = 1
                                     default: break
                                 }
                             }
+                        }
                 )
             }
             .clipped()