fix: cancel in mfa screen works again

app/src/main/java/chat/revolt/screens/login/LoginScreen.kt

@@ -88,6 +88,9 @@ class LoginViewModel @Inject constructor(
         }
     }
 
+    fun navigationComplete() {
+        _navigateTo = null
+    }
 
     fun setEmail(email: String) {
         _email = email
@@ -120,6 +123,9 @@ fun LoginScreen(
                 }
             }
         }
+        if (viewModel.navigateTo != null) {
+            viewModel.navigationComplete()
+        }
     }
 
     Column(