Fix mention pills display on iOS 16

Riot/Categories/UITextView.swift

@@ -0,0 +1,29 @@
+// 
+// Copyright 2022 New Vector Ltd
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+import UIKit
+
+extension UITextView {
+    /// Invalidates display for all text attachment inside the text view.
+    @objc func vc_invalidateTextAttachmentsDisplay() {
+        self.attributedText.enumerateAttribute(
+            .attachment,
+            in: NSRange(location: 0, length: self.attributedText.length),
+            options: []) { _, range, _ in
+                self.layoutManager.invalidateDisplay(forCharacterRange: range)
+            }
+    }
+}