Fix double gestures in attachments gallery

Tusker/Screens/Attachment Gallery/GalleryViewController.swift

@@ -67,7 +67,9 @@ class GalleryViewController: UIPageViewController, UIPageViewControllerDataSourc
         self.pages = attachments.map {
             switch $0.kind {
             case .image:
-                return LoadingLargeImageViewController(attachment: $0)
+                let vc = LoadingLargeImageViewController(attachment: $0)
+                vc.shrinkGestureEnabled = false
+                return vc
             case .video, .audio:
                 let vc = AVPlayerViewController()
                 vc.player = AVPlayer(url: $0.url)

Tusker/Screens/Large Image/LoadingLargeImageViewController.swift

@@ -33,6 +33,8 @@ class LoadingLargeImageViewController: UIViewController, LargeImageAnimatableVie
         }
     }
     
+    var shrinkGestureEnabled = true
+    
     var animationSourceInfo: LargeImageViewController.SourceInfo?
     var animationImage: UIImage? { animationSourceInfo?.image ?? largeImageVC?.image }
     var animationGifData: Data? { largeImageVC?.gifData }
@@ -91,8 +93,10 @@ class LoadingLargeImageViewController: UIViewController, LargeImageAnimatableVie
             }
         }
         
+        if shrinkGestureEnabled {
             dismissInteractionController = LargeImageInteractionController(viewController: self)
         }
+    }
     
     override func didMove(toParent parent: UIViewController?) {
         super.didMove(toParent: parent)