Description of problem:
Checked snippet and chosen OS family at the same time.
There is more ways how to get to this state.

In create partition table choose the OS family and than click on snippet and OS family will hide and than submit. In Partition table menu is just created partition table with both the snippet and with OS family at the same time and that's wrong.

The same problem can happen after editing/cloning of partition table with the same way. Already OS family was chosen and in editing or cloning the snippet is checked. This leads to the same bug.

How reproducible:
Deterministic

Steps to Reproduce:
1. Hosts-> Partition Table-> Create Partition Table
2. Choose OS family and than check the box of snippet, fill other necessary inputs and submit it.
3. In partition table menu is displayed the checked snippet and written OS family at the same time.

Actual results:
Both snippet and OS family are in Partition Table

Expected results:
Just one of them should be there, OS family or snippet.