dialog_widget: Check if modal is open before closing.

web/src/dialog_widget.ts

@@ -98,6 +98,10 @@ export function show_dialog_spinner(): void {
     });
 }
 
+export function is_open(): boolean {
+    return modals.any_active() && modals.active_modal() === "#dialog_widget_modal";
+}
+
 // Supports a callback to be called once the modal finishes closing.
 export function close(on_hidden_callback?: () => void): void {
     modals.close("dialog_widget_modal", {on_hidden: on_hidden_callback});

web/src/unread_ops.js

@@ -160,7 +160,10 @@ function bulk_update_read_flags_for_narrow(narrow, op, args = {}) {
                     blueslip.log("Cleared old_unreads_missing after bankruptcy.");
                 }
             }
-            dialog_widget.close();
+
+            if (dialog_widget.is_open()) {
+                dialog_widget.close();
+            }
         },
         error(xhr) {
             if (xhr.readyState === 0) {