Description of problem:
"Add" should be "Add volume" in Bootable volumes page, so it looks align with others:
1. in catalog -> instanceType, it's "Add volume".
2. check other pages, all uses terms like "Create Template", "Create DataSource", "Create disks".

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

How reproducible:

Steps to Reproduce:
1.
2.
3.

Actual results:

Expected results:

Additional info: