fix(files): do not open file by id on load for folders

[ShGKme]

• Resolves

1. Open an empty folder
2. Go back via "Go back" button
3. Reload the page
4. Infinity loading and a dead tab 😵

Happens for any URL opening with fileid for a subfolder.

Summary

• When a page is opened with a fileid, the default file action is executed
• For example, opening an image file in the Image Viewer
• But this also happens for folders => folder is open

Then the following is happening

1. Open /apps/files/files/1228?dir=/parent-folder-of-1228
2. /parent-folder-of-1228 is loaded
3. There is a 1228 file
4. Execute the default file action
5. Open a folder
6. Redirect to /apps/files/files/1228?dir=/parent-folder-of-1228/folder-1228
7. File 1228 is not present in this folder => redirect to the correct directory with the file 1228
8. Redirect to /apps/files/files/1228?dir=/parent-folder-of-1228
9. Infinity loop

TODO

• Only execute the default file action for files, not folders

Screenshots

Before

folder-before.mp4

After

folder-after.mp4

Checklist

• Code is properly formatted
• Sign-off message is added to all commits
• Tests (unit, integration, api and/or acceptance) are included
• Screenshots before/after for front-end changes
• Documentation (manuals or wiki) has been updated or is not required
• Backports requested where applicable (ex: critical bugfixes)

[ShGKme]

/backport a8e4edb to stable28

[ShGKme]

Rebased onto master