web/download: do not show additional dialog on top of dialog in openURL

Author: dumbmoron

web/src/components/dialog/SavingDialog.svelte

@@ -69,7 +69,7 @@
                             if (file) {
                                 return openFile(file);
                             } else if (url) {
-                                return openURL(url);
+                                return openURL(url, true);
                             }
                         }}
                     >

web/src/lib/download.ts

@@ -51,15 +51,15 @@ export const shareFile = async (file: File) => {
     });
 }
 
-export const openURL = (url: string) => {
+export const openURL = (url: string, hasDialog = false) => {
     if (!['http:', 'https:'].includes(new URL(url).protocol)) {
         return alert('error: invalid url!');
     }
 
     const open = window.open(url, "_blank", "noopener,noreferrer");
 
     /* if new tab got blocked by user agent, show a saving dialog */
-    if (!open) {
+    if (!open && !hasDialog) {
         return openSavingDialog({
             url,
             body: get(t)("dialog.saving.blocked")