Add OnPropertyChanged() for double pinyin properties

Author: VictoriousRaptor

Flow.Launcher.Infrastructure/UserSettings/Settings.cs

@@ -290,9 +290,33 @@ public CustomBrowserViewModel CustomBrowser
         /// </summary>
         public bool ShouldUsePinyin { get; set; } = false;
 
-        public bool UseDoublePinyin { get; set; } = true; //For developing
+        private bool _useDoublePinyin = true; // TODO: change default to false BEFORE RELEASE
+        public bool UseDoublePinyin
+        {
+            get => _useDoublePinyin;
+            set
+            {
+                if (_useDoublePinyin != value)
+                {
+                    _useDoublePinyin = value;
+                    OnPropertyChanged();
+                }
+            }
+        }
 
-        public string DoublePinyinSchema { get; set; } = "XiaoHe"; //For developing
+        private string _doublePinyinSchema = "XiaoHe";
+        public string DoublePinyinSchema
+        {
+            get => _doublePinyinSchema;
+            set
+            {
+                if (_doublePinyinSchema != value)
+                {
+                    _doublePinyinSchema = value;
+                    OnPropertyChanged();
+                }
+            }
+        }
 
         public bool AlwaysPreview { get; set; } = false;