Fixes #4976 - Replaced HPGrowingTextView with GrowingTextView. Reduced inheritance chain.

Riot/Modules/Room/Views/InputToolbar/RoomInputToolbarTextView.swift

@@ -0,0 +1,32 @@
+// 
+// Copyright 2021 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 GrowingTextView
+
+class RoomInputToolbarTextView: GrowingTextView {
+    
+    override var keyCommands: [UIKeyCommand]? {
+        return [UIKeyCommand(input: "\r", modifierFlags: [], action: #selector(keyCommandSelector(_:)))]
+    }
+    
+    @objc private func keyCommandSelector(_ keyCommand: UIKeyCommand) {
+        guard keyCommand.input == "\r", let delegate = (self.delegate as? RoomInputToolbarView) else {
+            return
+        }
+        
+        delegate.onTouchUp(inside: delegate.rightInputToolbarButton)
+    }    
+}