fix: add cancel button for better UI flow (MESSENGER-7861)

Riot/Modules/Reauthentication/ReauthFallBackViewController.swift

@@ -53,10 +53,16 @@ final class ReauthFallBackViewController: AuthFallBackViewController, Themable {
     }
     
     private func setupNavigationBar() {
+        // bwi #7861 change logic to both have a cancel and a close button. We don't need a back button here
         let doneBarButtonItem = MXKBarButtonItem(title: VectorL10n.close, style: .plain) { [weak self] in
             self?.didValidate?()
         }        
-        self.navigationItem.leftBarButtonItem = doneBarButtonItem
+        self.navigationItem.rightBarButtonItem = doneBarButtonItem
+        
+        let cancelBarButtonItem = MXKBarButtonItem(title: VectorL10n.cancel, style: .plain) { [weak self] in
+            self?.didCancel?()
+        }
+        self.navigationItem.leftBarButtonItem = cancelBarButtonItem
     }
 }