One of my pet peeves has always been the inability to change the order of menu items in Kodi. Now I know this can be done by editing XML files but to be honest it was always a pain for me. Anyway after some google searches I found a thread that discussed this request and others re: Kodi skin changes to the default estuary skin. I'm not the author and have no knowledge on the scripting being done but I can verify that it worked exactly as I expected with respect to rearranging menu items although it does much more. See thread for downloading Kodi add-on.
https://forum.kodi.tv/showthread.php?tid=333143
EDIT: Updated Link
INCLUDES EXPRESS 2-4 DAY DELIVERY 
Topic: Kodi 18 default skin modification add-on (Read 1544 times)
