fix: Properly calculate intermediate icon for touch icon generation

[juliusknorr]

Fix touch icon rendering that is used by iOS devices if you add a webpage to the home screen. While the previous logic used to work it seems these days imagick does not have a resolution set for svg files, so we need to change calculation slightly so that our intermediate image has the right sizing for the final icon.

(The resolution naming seems confusing here, it is rather the density https://www.php.net/manual/en/imagick.setimageresolution.php#96182)

Before	After

[susnux]

code makes sense

[juliusknorr]

/backport to stable30

[backportbot]

The backport to stable30 failed. Please do this backport manually.

# Switch to the target branch and update it
git checkout stable30
git pull origin stable30

# Create the new backport branch
git checkout -b backport/47670/stable30

# Cherry pick the change from the commit sha1 of the change against the default branch
# This might cause conflicts, resolve them
git cherry-pick 463c21d2

# Push the cherry pick commit to the remote repository and open a pull request
git push origin backport/47670/stable30

Error: Failed to clone repository: Failed to checkout branches: Updating 1cc7851..7964058
From https://github.com/nextcloud/server

• [deleted] (none) -> origin/7935-download-files-via-post
• [deleted] (none) -> origin/JonathanTreffler-stop-spamming-deprecations
• [deleted] (none) -> origin/add-clear-add-to-user-status-public-api
• [deleted] (none) -> origin/add-integration-tests-for-getting-folder-sizes
• [deleted] (none) -> origin/add-vtimezone-data-when-creating-personal-calendar
• [deleted] (none) -> origin/admin_audit/enh/move-to-event-listeners
• [deleted] (none) -> origin/artonge/feat/download_providers
• [deleted] (none) -> origin/bug/files-scroll
• [deleted] (none) -> origin/bugfix/38171/revert-status-when-overwritten
• [deleted] (none) -> origin/bugfix/avoid-extra-stream-copy
• [deleted] (none) -> origin/bugfix/noid/unavailable-shares
• [deleted] (none) -> origin/cache-mimtype-mapping
• [deleted] (none) -> origin/chore/catch-missing-non-optional-controller-parameter
• [deleted] (none) -> origin/chore/security/log-password-confirmation-user-backend
• [deleted] (none) -> origin/dependabot/npm_and_yarn/core-js-3.38.1
• [deleted] (none) -> origin/direct-access-shared-calendar
• [deleted] (none) -> origin/email-template-html-fragment
• [deleted] (none) -> origin/enh/a11y-util
• [deleted] (none) -> origin/enh/noid/iconfig
• [deleted] (none) -> origin/enh/noid/use-taskprocessing-in-old-managers
• [deleted] (none) -> origin/enhancement/caldav-resources-sync-command
• [deleted] (none) -> origin/enhancement/typed-db-entity
• [deleted] (none) -> origin/external-list-for
• [deleted] (none) -> origin/extract-caldav-sharing-plugin
• [deleted] (none) -> origin/feat-add-iavaialble-in-maintenance-mode
• [deleted] (none) -> origin/feat/mail-admin-vue
• [deleted] (none) -> origin/file-cache-insertion-atomic
• [deleted] (none) -> origin/fix/44160/ctrl-f-trigger-global-search
• [deleted] (none) -> origin/fix/files-non-visual-loading-info
• [deleted] (none) -> origin/fix/header-styles
• [deleted] (none) -> origin/fix/noid/identity-proof-key-checksum
• [deleted] (none) -> origin/fix/user-settings-admin
• [deleted] (none) -> origin/home-storage-lazy-datadir
• [deleted] (none) -> origin/introduce/orm
• [deleted] (none) -> origin/locate-key-fix
• [deleted] (none) -> origin/mountcache-lazy-user
• [deleted] (none) -> origin/multi-object-store
• [deleted] (none) -> origin/remove_depreated_files
• [deleted] (none) -> origin/setupmanager-lazy-user
• [deleted] (none) -> origin/share-null-source
• [deleted] (none) -> origin/storage-cache-init-in-transaction
• [deleted] (none) -> origin/trashbin-skip-logging
• [deleted] (none) -> origin/upload-chunk-locking
• [deleted] (none) -> origin/use_HSTS
• [deleted] (none) -> origin/user-files-debug-info
• [deleted] (none) -> origin/work/sharing_trash

• 5c9d32b...1281f44 fix/appstore-upgrade-failure -> origin/fix/appstore-upgrade-failure (forced update)
  error: Your local changes to the following files would be overwritten by merge:
  dist/4254-4254.js.map.license
  dist/4696-4696.js.map.license
  dist/5643-5643.js.map.license
  Please commit your changes or stash them before you merge.
  Aborting

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

[juliusknorr]

/backport to stable30