If you want to know how to put new style check it here:
there are 3 solutions
1. You may create Entity, and in after starup method create necessary number of objects, for each value you have.
Then you can create assosiation and select filtered object for different cases .
2. The other solution can be to have separate enumeration for each case.
3. Just hide the last option with css
Find the last child of your container and hide it.
You just need to find the right class and put it instead of .my-div.
You may also specify custom class so that style does not apply on every element in every page.
It is also possible to access n-th child
There's a widget for that:
It gives you full control over which of the enums you wish to show and hide by following the documentation
Guess App admin function will be limited used in a specific process.
Thus you could opt to not add this to the Enumeration at all, and cover the process of adding app admins differently.