Issue title: [Bug]: unable to get steam prefixes to show up in bottles
 Issue body: ### Describe the bug

i have enabled proton prefixes support, restarted bottles, added xdg-data/steam and i have also tried ~/.local/share/Steam and both times i have been unable to get the steam prefixes to show up. i have tried this with both the flatpak version and aur version and both have not been able to work. i had installed the steam runtime version of steam located in manjaro(steam-manjaro, equivalent to steam in arch repos)

### To Reproduce

1. enable steam prefixes
2. restart bottles
3. open bottles
4. no prefixes

### Package

Flatpak from Flathub

### Distribution

Manjaro

### Troubleshooting Logs

```shell
Version: 2022.7.28-brescia-2
Display:
    X.org: true
    X.org (port): :99.0
    Wayland: false
Graphics:
    vendors:
        nvidia:
            vendor: nvidia
            envs:
                __NV_PRIME_RENDER_OFFLOAD: '1'
                __GLX_VENDOR_LIBRARY_NAME: nvidia
                __VK_LAYER_NV_optimus: NVIDIA_only
            icd: /usr/lib/x86_64-linux-gnu/GL/vulkan/icd.d/nvidia_icd.json:/usr/lib/i386-linux-gnu/GL/vulkan/icd.d/nvidia_icd.json
    prime:
        integrated: null
        discrete: null
Kernel:
    Type: Linux
    Version: 5.18.12-3-MANJARO
Distro:
    Name: GNOME
    Version: '"42 (Flatpak runtime)"'
Disk:
    Total: 8351174656
    Free: 8351014912
RAM:
    MemTotal: 15.6GiB
    MemAvailable: 1.7GiB
Bottles_envs: null
```


### Display Protocol

X11

### Display Backend used by Bottles

X11

### Additional context

_No response_
 Comments: 
 Comment 0: Where is located your steam installation?
~/.steam?
 Comment 1: is it .steam which is full of symlinks leading to ~/.local/share/Steam
 Comment 2: Try giving Bottles access to .steam too
 Comment 3: nope nothing changed here are the flags for filesystem "~/.local/share/Steam:rw, ~/.steam"
 Comment 4: I'm facing up exactly the same issue.
{'source': 'GithubIssues', 'repo_name_with_owner': 'bottlesdevs/Bottles', 'issue_id': 1327900040, 'repo_stars': 3607.0}