[2144828] "?" icon is too big in VM Template Disk tab

+++ This bug was initially created as a clone of Bug #2144580 +++

Description of problem:
"?" icon/Help icon is too big in the VM Template's Disk tab.

Version-Release number of selected component (if applicable):
4.13

How reproducible:
always

Steps to Reproduce:
1. Go to Virtualization > Templates
2. Click on some template or create one/access VM Template's details
3. Click on the Disks tab and see the icon

Actual results:
Help icon is too big.

Expected results:
Smaller size if the icon - same as, for example, in the VM's Disks/Environment tabs - in size "small" (Patternfly Help icon).

Additional info:
There is an older BZ for the same problem but for VMs:
https://bugzilla.redhat.com/show_bug.cgi?id=2090057