fix unnecessary scroll to parent when opening new tab

src/public/javascripts/widgets/note_tree.js

@@ -831,4 +831,11 @@ export default class NoteTreeWidget extends TabAwareWidget {
 
         noteCreateService.duplicateNote(noteId, branch.parentNoteId);
     }
+
+    async tabNoteSwitchedEvent({tabContext, notePath}) {
+        // this causes unnecessary scrolling to active note
+        if (tabContext.isActive()) {
+            super.tabNoteSwitchedEvent({tabContext, notePath});
+        }
+    }
 }

src/public/javascripts/widgets/tab_row.js

@@ -431,11 +431,13 @@ export default class TabRowWidget extends BasicWidget {
     removeTab(tabId) {
         const tabEl = this.getTabById(tabId)[0];
 
-        tabEl.parentNode.removeChild(tabEl);
-        this.cleanUpPreviouslyDraggedTabs();
-        this.layoutTabs();
-        this.setupDraggabilly();
-        this.setVisibility();
+        if (tabEl) {
+            tabEl.parentNode.removeChild(tabEl);
+            this.cleanUpPreviouslyDraggedTabs();
+            this.layoutTabs();
+            this.setupDraggabilly();
+            this.setVisibility();
+        }
     }
 
     getTabIdsInOrder() {