Show Quick Replies for visitor when the QR is the latest in history

This PR allows Quick Reply buttons to be displayed from history if quick
reply button is the last message. This works for regular and authenticated
vistor. The same implementation will be added to Secure Conversations in
a subsequent PR because of a blocking issue.

MOB-2580

GliaWidgets/Sources/ViewModel/Chat/ChatViewModel.swift

@@ -390,6 +390,11 @@ extension ChatViewModel {
                     fromHistory: self.environment.loadChatMessagesFromHistory()
                 )
             }
+            if let item = items.last, case .gvaQuickReply(_, let button, _, _) = item.kind {
+                let props = button.options.map { self.quickReplyOption($0) }
+                self.action?(.quickReplyPropsUpdated(.shown(props)))
+            }
+
             self.historySection.set(items)
             self.action?(.refreshSection(self.historySection.index))
             self.action?(.scrollToBottom(animated: false))