Don't wait for code symbols when providing outlines to view (microsoft#210708)

Author: DonJayamanne

src/vs/workbench/contrib/notebook/browser/contrib/outline/notebookOutline.ts

@@ -561,7 +561,8 @@ export class NotebookOutlineCreator implements IOutlineCreator<NotebookEditor, O
 		if (target === OutlineTarget.QuickPick && showAllGotoSymbols) {
 			await outline.setFullSymbols(cancelToken);
 		} else if (target === OutlineTarget.OutlinePane && showAllOutlineSymbols) {
-			await outline.setFullSymbols(cancelToken);
+			// No need to wait for this, we want the outline to show up quickly.
+			void outline.setFullSymbols(cancelToken);
 		}
 
 		return outline;

src/vs/workbench/contrib/notebook/browser/viewModel/notebookOutlineProvider.ts

@@ -115,6 +115,10 @@ export class NotebookCellOutlineProvider {
 					delayedRecompute();
 				}
 			}));
+			// Perhaps this is the first time we're building the outline
+			if (!this._entries.length) {
+				this._recomputeState();
+			}
 		}
 		this._disposables.add(this._editor.onDidChangeModel(monitorModelChanges));
 		monitorModelChanges();