round attachment approval toolbar

SignalMessaging/attachments/AttachmentApprovalViewController.swift

@@ -532,10 +532,13 @@ class CaptioningToolbar: UIView, UITextViewDelegate {
 
         textView.delegate = self
         textView.backgroundColor = UIColor.white
-        textView.layer.cornerRadius = 4.0
+        textView.layer.cornerRadius = kMinTextViewHeight / 2
+
         textView.addBorder(with: UIColor.lightGray)
         textView.font = UIFont.ows_dynamicTypeBody
         textView.returnKeyType = .done
+        textView.textContainerInset = UIEdgeInsets(top: 7, left: 7, bottom: 7, right: )
+        textView.scrollIndicatorInsets = UIEdgeInsets(top: 5, left: 0, bottom: 5, right: 3)
 
         let sendTitle = NSLocalizedString("ATTACHMENT_APPROVAL_SEND_BUTTON", comment: "Label for 'send' button in the 'attachment approval' dialog.")
         sendButton.setTitle(sendTitle, for: .normal)