luci-app-unbound: return 'enabled' boolean value

During load, we shall return the loaded boolean, as well
as setting the section_enabled boolean.

Closes #8400

Signed-off-by: Paul Donald <newtwen+github@gmail.com>

applications/luci-app-unbound/htdocs/luci-static/resources/view/unbound/zones.js

@@ -126,6 +126,7 @@ return view.extend({
 		ena.load = (section_id) => { 
 			let _temp = uci.get('unbound', section_id, 'enabled');
 			if (_temp === '1') section_enabled = true;
+			return _temp;
 		}
 
 		return m.render();