fix loading custom logo image

[icewind1991]

Seems to be a leftover from #34599

To test:

• upload a custom logo image in theming
• open /index.php/apps/theming/icon

Note that you might need to mess with the caching or re-upload the icon to get the change to show.

[icewind1991]

/backport to stable26

[icewind1991]

/backport to stable25

[szaimen]

LGTM but didnt test

[szaimen]

failing tests are releated

[szaimen]

nodb failure still related

[szaimen]

nodb failure still related...

[icewind1991]

/backport to stable27

[backportbot-nextcloud]

The backport to stable25 failed. Please do this backport manually.

# Switch to the target branch and update it
git checkout stable25
git pull origin/stable25

# Create the new backport branch
git checkout -b fix/foo-stable25

# Cherry pick the change from the commit sha1 of the change against the default branch
# This might cause conflicts. Resolve them.
git cherry-pick abc123

# Push the cherry pick commit to the remote repository and open a pull request
git push origin fix/foo-stable25

More info at https://docs.nextcloud.com/server/latest/developer_manual/getting_started/development_process.html#manual-backport

[backportbot-nextcloud]

The backport to stable27 failed. Please do this backport manually.

# Switch to the target branch and update it
git checkout stable27
git pull origin/stable27

# Create the new backport branch
git checkout -b fix/foo-stable27

# Cherry pick the change from the commit sha1 of the change against the default branch
# This might cause conflicts. Resolve them.
git cherry-pick abc123

# Push the cherry pick commit to the remote repository and open a pull request
git push origin fix/foo-stable27

More info at https://docs.nextcloud.com/server/latest/developer_manual/getting_started/development_process.html#manual-backport

[solracsf]

/backport to stable25

[szaimen]

/backport to stable27