fix approver placeholder not showing in ie11

What does this MR do?

Prevent nested svg, so approver placeholder icon shows in ie11

Are there points in the code the reviewer needs to double check?

do we have preferred svg-vue method?

Screenshots (if relevant)

Chrome 59 OSX:

Safari 10

Edge

Firefox

IE11:

Does this MR meet the acceptance criteria?

• Changelog entry added, if necessary
• [ ] Documentation created/updated
• [ ] API support added
• Tests
  • Added for this feature/bug
  • All builds are passing
• Conform by the merge request performance guides
• Conform by the style guides
• Branch has no merge conflicts with master (if it does - rebase it please)
• Squashed related commits together

What are the relevant issue numbers?

Closes #1925 (closed)