qs: large sweep of dead code removals

quickshell/Modules/Plugins/ListSettingWithInput.qml

@@ -1,6 +1,7 @@
 import QtQuick
 import qs.Common
 import qs.Widgets
+import "../../Common/QmlUtils.js" as QmlUtils
 
 Column {
     id: root
@@ -22,7 +23,7 @@ Column {
     }
 
     function loadValue() {
-        const settings = findSettings();
+        const settings = QmlUtils.findSettings(root.parent);
         if (settings) {
             isLoading = true;
             items = settings.loadValue(settingKey, defaultValue);
@@ -34,23 +35,12 @@ Column {
         if (isLoading) {
             return;
         }
-        const settings = findSettings();
+        const settings = QmlUtils.findSettings(root.parent);
         if (settings) {
             settings.saveValue(settingKey, items);
         }
     }
 
-    function findSettings() {
-        let item = parent;
-        while (item) {
-            if (item.saveValue !== undefined && item.loadValue !== undefined) {
-                return item;
-            }
-            item = item.parent;
-        }
-        return null;
-    }
-
     function addItem(item) {
         items = items.concat([item]);
     }