Hook for detecting click in cWindow, currently only cLuaWindow

[Seadragon91]

I tested the hook for regular windows and it works.
But for this I have a idea:

1. Get the block entity that the player wants to open
   
2. Deny the opening of the block entity
   
3. Create a lua window with the content of the block entity
   
4. Call cPlayer:OpenWindow to open it
   
5. Now the hook will be called and combining a list containing the player and the block entity - everything should be possible
   
6. If the player closes the window, the callback SetOnClosing can be used to write the content back