Don't show chat toolbars when chat doesn't have DOM focus (microsoft#186801)

Fix microsoft/vscode-copilot#139

Author: roblourens

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

@@ -66,7 +66,9 @@
 }
 
 .monaco-list-row:not(.focused) .interactive-item-container:not(:hover) .header .monaco-toolbar,
-.monaco-list-row:not(.focused) .interactive-item-container:not(:hover) .header .monaco-toolbar .action-label {
+.monaco-list:not(:focus-within) .monaco-list-row .interactive-item-container:not(:hover) .header .monaco-toolbar,
+.monaco-list-row:not(.focused) .interactive-item-container:not(:hover) .header .monaco-toolbar .action-label,
+.monaco-list:not(:focus-within) .monaco-list-row .interactive-item-container:not(:hover) .header .monaco-toolbar .action-label {
 	/* Also apply this rule to the .action-label directly to work around a strange issue- when the
 	toolbar is hidden without that second rule, tabbing from the list container into a list item doesn't work
 	and the tab key doesn't do anything. */