expandable dialogs for color scheme, fonts and scheduling modes

Modules/Settings/Pages/Panels/Sidebar/SidebarLlm.qml

@@ -75,10 +75,18 @@ PageBase {
 
 			acceptLabel: qsTr("Confirm")
 			enabled: Object.keys(model).length > 0
+			settingAnchor: "panels-sidebar-select-scheme"
+			separateContent: false
 			header: qsTr("Select scheme")
 			first: true
 			last: true
-			icon: "add"
+			icon: "format_paint"
+			iconLabel.font.pointSize: Tokens.font.size.large
+			rowButton.trailingIcon: "open_in_new"
+			onOpenChanged: {
+				root.sState.dimmed = open;
+			}
+			rowButton.activeItem: root.schemes.find(s => s.id === Config.llm.appearance.scheme).label
 			label: qsTr("Color scheme")
 			subtext: qsTr("Select the color scheme used for code blocks")
 			model: root.schemes