You can create folders for your variables. Select the variable and go to the details panel and change it’s category. Typing a name in the category will create a folder if one by that name doesn’t exist, otherwise it will put the variable in that folder.
Also, you can drag the variable and put it in whatever order you want, whether that be dropping it into a folder or reordering inside the folder.
Now functions don’t have this capability… Was hoping it was going to come with 4.2.