设置前刷新样式列表，加载第三方样式

qml/Common.qml

@@ -122,10 +122,17 @@ Item {
         });
     }
 
-    Component.onCompleted: {
+    function updateStyleList() {
+        styles.length = 0;
+        stylesURL.length = 0;
+        stylesCFG.length = 0;
         const preset_list = NVG.Resources.filter(/advp.widget.mashiros.top/, /top.mashiros.advp-style/);
         parse_resource(preset_list, true);
         const third_list = NVG.Resources.filter(/.*/, /top.mashiros.advp-style/);
         parse_resource(third_list, false);
     }
+
+    Component.onCompleted: {
+        updateStyleList();
+    }
 }

qml/Main.qml

@@ -50,7 +50,11 @@ T.Widget {
     menu: Menu {
         Action {
             text: qsTr("Settings") + "..."
-            onTriggered: styleDialog.active = true
+            enabled: !styleDialog.active
+            onTriggered: {
+                Common.updateStyleList();
+                styleDialog.active = true
+            }
         }
     }