Hook NPPN_FILESAVED when checking if FSI can load the current file

Use case: set a new buffer's file type to "fsharp", save it.
This way, the "load in FSI" menu command will be enabled without having
to reload the file

Author: rdipardo

Source/Plugin/Src/FSIPlugin.pas

@@ -200,7 +200,7 @@ procedure TFsiPlugin.BeNotified(msg: PSciNotification);
       TLexerProperties.SetLexer;
       if sciMsg.nmhdr.code = NPPN_BUFFERACTIVATED then ToggleLoadFileCmd(sciMsg.nmhdr.idFrom);
     end;
-    NPPN_FILERENAMED: begin
+    NPPN_FILESAVED: begin
       ToggleLoadFileCmd(sciMsg.nmhdr.idFrom);
     end;
   end;