Explorer plugin: Quick Access link sorting

**Is your feature request related to a problem? Please describe.**

I have a few quick access files and folders configured for the explorer plugin:
```
C:\Users\username
C:\Users\username\folder1
C:\Users\username\folder2
```
The issue is that when I search for `username`, the child directories show up before the actual `username` folder in the results. It is unclear to me how the results are sorted, as it's neither using alphabetical nor length sort.

**Describe the solution you'd like**

A way to control how results are sorted. I think alphabetical path sorting would be a sensible default (in particular, it would solve the above issue).

Start by locating the Explorer plugin and the code that produces Quick Access search results. Reproduce the `username` search with the configured parent and child paths, then trace the existing ordering behavior. Done means the results use a documented, consistent sort order and the reported parent-folder case is resolved.

Written by the indexing model from the issue text.