Stashing tab shows not staged/ not tracked files in view

Hi,

I'm not sure it's even a bug.

When I was doing stashing in Stash[4] tab, you can switch what to stash by toggling staged/untracked files with keys `i/u` respectively.

At first I thought it's noop, since there was no visual indication or cue that anything changed. It works as it should by omitting untracked or staged files when toggling with respective keys.

I figured out that it behaves correctly without any obvious clue only by accident.
I had a single untracked directory with different user. The directory had `root` user and I couldn't stash it cause of permissions. Than the window popped up showing when I was attempting to stash with stashing configuration `{StashUntracked: true, ...}`. When pressing `u`, the config changed and I could stash only tracked files as expected.

**To Reproduce**
Create staged or untracked files with elevated permission like `root` in project folder. Notice error, than press u or i and see it stashes as expected.

**Expected behavior**
I expect to have visual cue for what will be stashed. It should be reflected in the file tree view upon pressing `i/u` keys.

**Screenshots**
The below screenshot actually show correct behavious, as there's nothing to stash, but files are still listed in file tree view

**Context (please complete the following information):**
- OS/Distro + Version: `Fedora Linux 39 (Workstation Edition) x86_64`
- GitUI Version `nightly 2024-06-09 ()`
- Rust version: `1.74.0-x86_64-unknown-linux-gnu`