Cloned from https://bugzilla.redhat.com/show_bug.cgi?id=1107743

Description of problem:
Assigning provisioning template to operating system is not straight forward - requires multiple steps which seems redundant to me and if they are not, there is not enough inline help/tips helping to explain the problem

Version-Release number of selected component (if applicable):
foreman 1.12

How reproducible:
always

Steps to Reproduce:
1. Create operating system
2. Hosts -> Provisioning templates -> Kickstart default user data ->
-> Association -> check checkbox nex to <your_operating_system> -> Submit
3. Hosts -> Operating systems -> <your_operating_system> -> Templates ->
-> select "Kickstart default user data" in "user_data" drop-down element ->
-> Submit

Actual results:
Steps 2. or 3. seems redundant to me

Expected results:
One of steps 2. or 3. might be redundant, or webUI could be altered to help me to understand this is needed (e.g. some hints added?)