support OPML from MindManager, fixes #1862

electron.js

@@ -22,7 +22,7 @@ app.on('window-all-closed', () => {
 });
 
 app.on('ready', async () => {
-    app.setAppUserModelId('com.github.zadam.trilium');
+//    app.setAppUserModelId('com.github.zadam.trilium');
 
     // if db is not initialized -> setup process
     // if db is initialized, then we need to wait until the migration process is finished

src/services/import/opml.js

@@ -36,6 +36,12 @@ async function importOpml(taskContext, fileBuffer, parentNote) {
         if (opmlVersion === 1) {
             title = outline.$.title;
             content = toHtml(outline.$.text);
+
+            if (!title || !title.trim()) {
+                // https://github.com/zadam/trilium/issues/1862
+                title = outline.$.text;
+                content = '';
+            }
         }
         else if (opmlVersion === 2) {
             title = outline.$.text;