Fix for Memory issue with context menu items (#4597)

* Added the inotifyPropertyChanged to all the properties and that stops the memory for shooting up

* some more inotify properties added

(cherry picked from commit 26fa05d9b661dadc5ab0257d540ab838a07c43a6)

* Revert "some more inotify properties added"

This reverts commit 845a94c9b2.

* Removed unnecessary inotifypropertychanged interfaces and cleaned up the code

* removed the ctrl+c from folder plugin

* removed unnecessary init

* Added unit test to check if PropertyChanged is called

* renamed var

* refactored the tests

* formatting and adding comments

* changed access modifier in test

* Used observable collection instead of a list

* clearing the observable collection instead of setting it to a new one

src/modules/launcher/Wox.Plugin/BaseModel.cs

@@ -11,7 +11,7 @@ namespace Wox.Plugin
         public event PropertyChangedEventHandler PropertyChanged;
 
         [NotifyPropertyChangedInvocator]
-        protected void OnPropertyChanged([CallerMemberName] string propertyName = null)
+        protected virtual void OnPropertyChanged([CallerMemberName] string propertyName = null)
         {
             PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
         }