fix: scope disabled-state CSS to also cover the native extra-setting-button

The is-disabled CSS I added only targeted .cmdr-slider .clickable-icon,
which is the wrapper class used by the custom Preact SliderComponent
(General tab). The Advanced Toolbar tab's three sliders go through
Obsidian's native Setting/ExtraButtonComponent API instead, which
renders the reset icon as a plain .extra-setting-button - a different
element entirely, not covered by that selector. Added a matching rule
scoped to a new cmdr-advanced-toolbar-settings wrapper class on that
tab's container.

src/styles/styles.scss

@@ -55,6 +55,12 @@
 	pointer-events: none;
 }
 
+.cmdr-advanced-toolbar-settings .extra-setting-button.is-disabled {
+	opacity: 0.35;
+	cursor: default;
+	pointer-events: none;
+}
+
 .cmdr-menu-more-options {
 	color: var(--text-muted);
 	position: absolute;

src/ui/components/AdvancedToolbarSettings.tsx

@@ -297,7 +297,11 @@ export default function AdvancedToolbarSettings({
 					</button>
 				)}
 			</div>
-			<div ref={ref} style={{ paddingBottom: "128px" }} />
+			<div
+				ref={ref}
+				className="cmdr-advanced-toolbar-settings"
+				style={{ paddingBottom: "128px" }}
+			/>
 		</Fragment>
 	);
 }