updating whats new

dist/preview release/what's new.md

@@ -57,6 +57,7 @@
 
 - Added GUI Editor project to master. ([msDestiny14](https://github.com/msDestiny14))
 - Moving GUI property tab components into GUIEditor. ([msDestiny14](https://github.com/msDestiny14))
+- Adding basic saving and loading funtionality. ([msDestiny14](https://github.com/msDestiny14))
 
 ### GUI