/structure load doesn't parse slashes correctly without quotes

The bug

Unlike other commands such as /function, /structure fails to parse slashes correctly and requires identifiers that use them to be quoted.

How to reproduce

1. /function test/test
   → ✔ It correctly parses, but tells you the function was not found

2. /structure load test/test ~ ~ ~
   → ❌ Syntax error

Also note that there are no command suggestions for structures even when files exist