Fix memory leak in attachment container view

Tusker/Views/Attachments/AttachmentsContainerView.swift

@@ -58,11 +58,11 @@ class AttachmentsContainerView: UIView {
         attachmentViews.removeAllObjects()
         moreView?.removeFromSuperview()
         
+        var accessibilityElements = [Any]()
+
         if attachments.count > 0 {
             self.isHidden = false
             
-            var accessibilityElements = [Any]()
-
             switch attachments.count {
             case 1:
                 let attachmentView = createAttachmentView(index: 0, hSize: .full, vSize: .full)
@@ -215,13 +215,16 @@ class AttachmentsContainerView: UIView {
                 accessibilityElements.append(topRight)
                 accessibilityElements.append(bottomLeft)
                 accessibilityElements.append(moreView)
-            }
 
-            self.accessibilityElements = accessibilityElements
+            }
         } else {
             self.isHidden = true
         }
         
+        // Make sure accessibilityElements is set every time the UI is updated, otherwise it holds
+        // on to strong references to the old set of attachment views
+        self.accessibilityElements = accessibilityElements
+
         contentHidden = Preferences.shared.blurAllMedia || status.sensitive
     }