fix: Adapt NcAppSidebar props to new version

[juliusknorr]

This was missed when renaming props in #5621

Otherwise the title is no longer editable in the details view.

[juliusknorr]

/backport to stable29

[juliusknorr]

/backport to stable29

[backportbot]

The backport to stable29 failed. Please do this backport manually.

# Switch to the target branch and update it
git checkout stable29
git pull origin stable29

# Create the new backport branch
git checkout -b backport/5729/stable29

# Cherry pick the change from the commit sha1 of the change against the default branch
# This might cause conflicts, resolve them
git cherry-pick 23291fcf

# Push the cherry pick commit to the remote repository and open a pull request
git push origin backport/5729/stable29

Error: Failed to create pull request: Validation Failed: {"resource":"PullRequest","code":"custom","message":"A pull request already exists for nextcloud:backport/5729/stable29."}

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Learn more about backports at https://docs.nextcloud.com/server/stable/go.php?to=developer-backports.