Fix toolbar only showing up for hovered rows, not focused rows

Fix #104229

src/vs/workbench/contrib/notebook/browser/media/notebook.css

@@ -438,7 +438,7 @@
 	height: 2px;
 }
 
-.monaco-workbench .notebookOverlay > .cell-list-container > .monaco-list > .monaco-scrollable-element > .monaco-list-rows > .monaco-list-row .cell-has-toolbar-actions.focused .cell-title-toolbar,
+.monaco-workbench .notebookOverlay > .cell-list-container > .monaco-list > .monaco-scrollable-element > .monaco-list-rows > .monaco-list-row.focused .cell-has-toolbar-actions .cell-title-toolbar,
 .monaco-workbench .notebookOverlay > .cell-list-container > .monaco-list > .monaco-scrollable-element > .monaco-list-rows > .monaco-list-row .cell-has-toolbar-actions.cell-output-hover .cell-title-toolbar,
 .monaco-workbench .notebookOverlay > .cell-list-container > .monaco-list > .monaco-scrollable-element > .monaco-list-rows > .monaco-list-row .cell-has-toolbar-actions:hover .cell-title-toolbar {
 	visibility: visible;