fix: Avoid issues when switching between versions

[juliushaertl]

Improve check if the opened file is the same since there might be different conditions now with version browsing where the fileid remains, therefore we continue checking on the mtime and source to detect if the file rendering component should be refreshed

[juliushaertl]

/backport to stable27

[juliushaertl]

/compile

[juliushaertl]

All known failures according to the failure rate of master

[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

[juliushaertl]

/backport e1f2c85 to stable27